Rocket Battery 2YBD-91041

Rocket Battery 2YBD-91041

2YBD-91041 is not the official product model of Rocket. It is an OEM part number assigned by the vehicle manufacturer (OE part for Hyundai / Kia). Rocket’s native model designations follow SMF / EFB / AGM series (예를 들어. 80D26L, 110D31L). The 2YBD marking is printed on the battery label for spare parts identification within the automaker’s supply system.

Brand Overview

ROCKET (SEBANG Battery, 한국)

Rocket is the top-selling automotive battery brand in South Korea and an original equipment supplier for Hyundai and Kia. Its product portfolio is divided into three main lines:

1. SMF Maintenance-free Calcium Lead Battery: For conventional gasoline vehicles without start-stop.
2. EFB Enhanced Flooded Battery: For gasoline vehicles equipped with ISG auto start-stop.
3. AGM Absorbent Glass Mat Battery: For vehicles with start-stop systems and premium models.

Key technical features: Lead-calcium alloy grids, low self-discharge, built-in flame-arrest safety valves, built-in hydrometer state-of-charge indicator, and high vibration resistance for harsh on-board operating conditions.

Identification Notes for 2YBD-91041

1. 범주: 12V automotive starting battery, OEM manufactured by Rocket for Hyundai / Kia
2. Code breakdown: 2YBD = production batch & OEM allocation code; 91041 = automaker material spare part number
3. Common specifications for 2YBD-series batteries

전압: 12다섯

유형: SMF maintenance-free / EFB for start-stop (depends on vehicle ISG configuration)

Typical capacity: 70아 / 80아, CCA cold cranking current: 600~700A

Enclosure standard: JIS Japanese/Korean case (mostly D26 footprint)

⚠️ Multiple capacity variants exist under this single OEM part number. Ah rating, CCA, terminal polarity and physical dimensions must be verified from the printed label on the battery itself. The part number alone cannot confirm the exact capacity.

선택 & 교체 지침

1. Four core parameters to verify before replacement: 정격 용량 (아), CCA cold cranking amps, positive/negative terminal polarity, case length × width × height
2. For start-stop vehicles: Never replace EFB/AGM batteries with ordinary SMF batteries, otherwise service life will be drastically shortened.
3. Domestic alternative brands: Camel, Varta, Sail. Imported alternatives: AtlasBX, GS Yuasa.

유지 & 문제 해결

Float voltage: 12.6~12.8V at rest; charging voltage 14.2~14.7V

저장: Store at ambient temperature; recharge monthly. Self-discharge rate approx. 3% per month.

Common faults:

1. Open-circuit voltage ＜12.2V: Battery discharged. Equalization charging required. Repeated deep discharge causes irreversible sulfation.
2. Voltage drops below 9.5V during cranking: High internal resistance due to aging, battery replacement recommended.
3. Case bulging or electrolyte leakage: Immediately remove from service. Do not attempt charging.

Foreign Trade charging.

Foreign Trade Reference (HS코드)

Lead-acid starting batteries for motor vehicles: 85071000

추천: If you have the physical battery, send the printed Ah, CCA, dimensions and EFB/SMF marking from the label. I can confirm the exact specification, match replacement models and recommend charger parameters.

How to Check if Your Vehicle is Compatible with 2YBD-91041 (Rocket OEM Battery)

중요한 메모: 2YBD-91041 is a Hyundai/Kia OEM spare part number, not an independent performance specification. It is factory fitted only on selected Hyundai and Kia models. For all other vehicle brands, compatibility cannot be judged by this part number alone. All five criteria below must be satisfied for fitment.

1. Confirm Vehicle Make (Highest Priority)

✅ Only Hyundai / Kia vehicles are potential candidates for this OEM part.

❌ Vehicles from VW, Toyota, Honda, Buick and other brands are immediately excluded.

Precise verification: Provide the VIN (Vehicle Identification Number) to query Hyundai/Kia EPC spare parts system and check whether 2YBD-91041 is listed as the original battery part number.

2. Verify Battery Technology Type (Most Critical for Start-Stop Vehicles)
3. If your vehicle has ISG auto start-stop: Original battery must be EFB. The 2YBD-91041 unit used for replacement must also be EFB. Do not use ordinary SMF maintenance-free batteries as a substitute, otherwise premature failure, disabled start-stop and DTC fault codes will occur.
4. If your vehicle has no auto start-stop: The corresponding 2YBD-91041 variant is standard SMF maintenance-free lead-acid battery.

⚠️ Downgrade is not allowed: Vehicles originally equipped with AGM batteries cannot directly use this 2YBD-91041 (this OEM number has no AGM version).

3. Check Electrical Parameters (Must Meet or Exceed OEM Minimum Requirements)

Check the printed label on your 2YBD-91041 battery:

1. 전압: 12다섯 (일치해야 함)
2. Rated capacity Ah: ≥ original battery Ah
3. CCA cold cranking amps: ≥ original battery CCA (SAE standard)

Slightly higher Ah/CCA is acceptable, but do not use a battery with ratings lower than OEM specification, otherwise cold cranking difficulty and insufficient power supply will result.

4. Physical Fit: Case Dimensions + Terminal Polarity
5. Outer case length/width/height must match the original battery. The battery tray and hold-down clamp must secure it properly, and the hood must close without squeezing the battery.
6. Positive/negative terminal position (left positive / right positive) must be identical to the original battery.
7. Terminal style: JIS thick post terminals for Korean/Japanese vehicles; wiring harness must connect without tension or pulling.
8. Post-Installation Procedure (Hyundai/Kia with BMS Battery Management)

For newer Hyundai/Kia vehicles with start-stop, battery registration must be performed via diagnostic scanner after replacement. This lets the ECU recognize the new battery parameters. Without registration, abnormal charging strategy will cause premature battery aging.

Quick Compatibility Checklist (All items ticked = compatible)

Vehicle is Hyundai / Kia

Vehicle start-stop configuration matches battery type (SMF / EFB) of 2YBD-91041

Ah and CCA ≥ original battery ratings

Case dimensions and terminal polarity match for physical mounting

Battery BMS registration available with diagnostic tool

3 Quick Verification Methods

1. Inspect old battery label: If your original battery label is printed with 2YBD-91041, it is directly compatible.
2. Check owner’s manual: Refer to battery section for factory specifications.
3. VIN lookup: Submit VIN to Hyundai/Kia spare parts system to confirm OEM battery part number.

Supplementary Reminder

Two capacity variants exist under the same 2YBD-91041 part number: 70아 / 80아. The part number alone cannot tell capacity. Always confirm specifications from the battery label before ordering.

Hyundai Forklift 2YBD-91041 (Korean Rocket Traction Battery)

애플리케이션: Hyundai electric counterbalance forklift. 2YBD-91041 is Hyundai OEM part number. Battery brand: Rocket (Korean Rocket traction lead-acid battery).

전반적인 차원: L985mm × W536mm × H745mm (including battery container height)

1. 기본사양
2. 전압: 48다섯 (Common battery pack for Hyundai 25/30/32/35B-9U)
3. 용량: 48V 715Ah (5-hour rate C5)
4. 건설: Tubular positive traction lead-acid battery, 24pcs 2V cells connected in series, steel battery container
5. 무게: 대략. 3450kg (complete container with electrolyte)
6. Dimension confirmation: L985 × W536 × H745mm, outer contour of battery container including terminals and top cover; recommended clearance inside battery compartment: 5~10mm per side
7. Applicable Forklift Models

Hyundai electric forklift: 25B-9U, 30B-9U, 32B-9U, 35B-9U (2.5t ~ 3.5t 4-wheel electric counterbalance)

Part No.2YBD-91041 is OEM optional Rocket battery assembly for these models

3. Features of Rocket Battery (Korean Rocket Traction Battery)
4. Tubular plate, deep cycle discharge, suitable for continuous heavy-duty forklift operation. Standard cycle life: 1200~1500 cycles @75% depth of discharge
5. Low-antimony grid, low water loss rate, 더 길어진 유지보수 간격
6. Korean OEM supporting Hyundai construction machinery, widely used for export equipment
7. Flooded type with regular water refilling, electrolyte level inspection required periodically
8. Selection Guidelines for Domestic Replacement (Replacement for 2YBD-91041)

Core constraints for replacement: Overall dimension 985×536×745mm, 48V715Ah, mounting holes of battery container, position of connecting copper busbars

1. Capacity not recommended below 715Ah, otherwise working duration will be insufficient
2. Height 745mm is critical. Many domestic batteries with same capacity have taller container and cannot fit Hyundai battery compartment
3. Traction battery must adopt tubular traction cell. Ordinary SLI starter battery cannot be used for replacement
4. Available domestic brands: Torch, Leoch, Tianneng traction series. Custom battery container assembly available according to this dimension
5. 유지 & 문제 해결 포인트
6. 충전 중: Use matched 48V intelligent forklift charger with equalization charging. Overcharging prohibited
7. Periodic check: Inspect electrolyte level every 10~15 working days, refill deionized water
8. Common faults: Weak individual cell, 산화된 & overheated terminals, acid leakage at container bottom
9. 리프팅: Container equipped with lifting lugs. Special forklift battery hoist must be used during replacement.
10. Foreign Trade / Customs Declaration Reference

Product name: Traction lead-acid battery (forklift battery assembly)

HS코드: 85072000 (Other lead-acid accumulators)

Hyundai Forklift OEM Part No.: 2YBD-91041｜Rocket (Korean Rocket) Traction Battery Full Specification

완전한 조립: 48V 715Ah (C5, 5-hour rate), 24pcs 2V tubular traction cells in series, flooded lead-acid battery with water refilling, OEM supporting battery assembly for Hyundai 2.5~3.5 ton electric counterbalance forklift

1. 기본 식별 정보
2. OEM Part Number: 2YBD-91041 (Hyundai forklift spare part number, NOT Rocket cell model number)
3. Battery Brand: ROCKET 로케트배터리 (Korean Rocket)
4. Battery Type: Traction Battery, PzS tubular plate lead-acid battery for forklift, NOT starting battery
5. Applicable Forklift Models: Hyundai electric counterbalance 25B-9U, 30B-9U, 32B-9U, 35B-9U (2.5t /3.0t /3.2t /3.5t)
6. 기원: 대한민국 (OEM assembly; domestic replacement can be custom battery container assembly made in China)
7. 물리적 차원 & 무게 (Complete battery container including top cover, 터미널, lifting lugs)

전반적인 차원: L985mm × W536mm × H745mm (Height includes battery container top cover, excluding extended cable connectors)

Wet weight (complete assembly with electrolyte): ≈3450 kg (±5% tolerance)

Container material: Welded steel battery box, equipped with lifting lugs, overflow channel, acid collecting base

Internal layout: 24pcs 2V cells arranged in 2 행, connected in series by copper busbars, positive & negative terminals led out; reserved space inside box for electrolyte expansion

3. 핵심 전기 매개변수
4. 공칭 전압: 48DC에서 (2V cell ×24pcs)
5. 정격 용량: 715Ah @ C5 (5-hour rate, 25℃)
6. Cell voltage: 2V per cell; static open circuit voltage of single cell: 2.08~2.12V
7. Cut-off discharge voltage (minimum working voltage for forklift): 42V for whole pack, single cell ≥1.75V (Stop discharging below this value to prevent sulfation and permanent cell damage)
8. Standard charging voltage: 58.8~60V (equalization stage); float / maintenance voltage 52.8V
9. Standard charging current: 0.1C≈71.5A; Max charging current ≤80A. Must use 3-stage intelligent charger for flooded traction battery
10. Continuous discharge: Support 0.5C continuous discharge; short-time peak discharge up to 1C (heavy load lifting)
11. Total battery energy: 48V ×715Ah = 34.32 kWh
12. Battery Material & Life Index
13. Plate construction: Tubular positive plate (PzS), pasted negative plate; low-antimony alloy grid to reduce gassing and water consumption
14. Electrolyte: Dilute sulfuric acid. Specific gravity (fully charged @25℃): 1.280 ±0.005 g/cm³; approx.1.12 when fully discharged
15. Design cycle life: 1200~1500 cycles @75% DOD (Depth of Discharge); 최대 1800+ cycles if daily discharge controlled at 50% DOD
16. 작동 온도 범위: Discharge -15℃ ~ +50℃; Charging 0℃ ~ +45℃; Optimal working temperature: 20~30℃
17. 특성: Deep cycle & 진동 방지; Flooded type requiring regular water refilling, NOT maintenance-free
18. 설치, 인터페이스 & Structure Information
19. 리프팅: 4 lifting lugs on container. Special battery hoist must be used for replacement. Do not lift by cables directly
20. 터미널: Heavy-duty copper terminals fixed by M10/M12 bolts; copper busbars supplied from factory, anti-oxidation grease applied on terminals
21. 케이블 콘센트: Cable exit on one end of battery box; fixed distance between positive and negative terminals matching original wiring position of Hyundai battery compartment
22. Compartment clearance: 5~10mm clearance per side inside forklift compartment. For domestic replacement, L/W/H dimension must be strictly controlled, height 745mm is hard limit
23. 통풍: Vent caps fitted on battery box to vent hydrogen during charging. Charging area must be well ventilated, open flame strictly prohibited
24. Routine Maintenance Standard
25. Refill medium: Distilled / deionized water only. Tap water or mineral water is forbidden
26. Liquid level inspection: Check every 10~15 working days; liquid level 10~15mm above plates, not exceeding maximum level mark
27. Equalization charge: Perform equalization charge every 10 normal charge-discharge cycles to correct cell voltage difference and prevent weak cell
28. Inspection items: Cell voltage, electrolyte specific gravity, terminal temperature, acid leakage, container corrosion
29. Allowable cell voltage difference: ≤0.05V between all cells when fully charged; voltage difference＞0.1V indicates weak cell requiring maintenance
30. Common Fault Symptoms

Weak single cell: Rapid capacity drop and shorter forklift runtime; weak cell shows obvious temperature rise and low specific gravity during charging

산화 & overheating on terminals: Loose bolts cause heat under high current, severe burn damage on copper busbars

Acid leakage on container: Weld corrosion of box or cracked cell shell. Stop operation immediately to avoid frame corrosion

Excessive water loss: Overcharging or excessive charger voltage accelerates electrolyte consumption

8. Foreign Trade Customs & Compliance Information

Product name: Traction lead-acid battery assembly (forklift battery)

HS코드: 85072000 (Other lead-acid accumulators)

인증: Korean KC for OEM; IEC60254 traction battery test report available for export

운송: Hazardous goods UN2794, wet lead-acid battery, dangerous goods packaging required

9. Mandatory Requirements for Domestic Replacement (Replacement for 2YBD-91041)

✅ Must satisfy:

1. Outer container dimension: L985 × W536 × H745mm
2. 사양: 48V 715Ah PzS tubular traction battery, 24pcs 2V cells
3. Lifting lug position, terminal position and cable outlet direction consistent with original
4. Total weight close to 3450kg (Battery weight affects forklift counterweight. Large weight deviation will impact forklift stability)

35B-X (Hyundai 48V version 3.5 ton electric forklift) can use this 48V 715Ah Rocket battery electrically, but cannot be installed as original assembly. Compartment structure differs, it is NOT OEM standard part

Original factory standard battery for 35B-X: 48다섯, capacity 600~700Ah. The battery compartment is side pull-out type (battery pulled out from side, not top hoisting type of 9U series). Internal cavity dimension of battery compartment, lifting lugs and cable outlet position are different from older 35B-9U

2YBD-91041 is OEM battery assembly for 35B-9U (top hoisting container), outer dimension L985×W536×H745mm

1. Electrical Matching ✅

전압: Both 48V. 제어 장치, motor and charger voltage system are compatible

용량: 715아, larger than original 600~700Ah of 35B-X, longer working time after installation

Discharge characteristic: PzS traction lead-acid, fully matched forklift traction working condition

2. Mechanical Installation Issues ⚠️ (Main constraint)
3. Different battery removal method

35B-X: Side pull-out battery, battery box generally without top lifting lugs

2YBD-91041 battery box: Equipped with top lifting lugs, designed for top hoisting into battery compartment for 9U series

2. Internal dimension of battery compartment

On-site measurement of internal L/W/H of 35B-X battery compartment, battery access direction and limit block is required.

Even if 985×536×745mm box fits into cavity, lifting lugs may cause interference, container mounting base holes and cable outlet direction may mismatch

3. Counterweight weight verification

Wet weight of this battery ≈3450kg. Need to check allowable battery weight range of 35B-X. Battery weight directly affects forklift rated load capacity and stability. Too heavy or too light will bring safety risk

3. Two Feasible Solutions

Option A: Reuse original Rocket cells and custom new container for 35B-X (추천)

Keep original 24pcs Rocket traction cells, custom new container: remove top lifting lugs, modify to side pull-out structure, adjust terminal position and mounting holes. Container dimension made according to measured internal size of 35B-X compartment. Electric circuit unchanged, 완벽한 핏.

Option B: Force fit existing 2YBD-91041 complete container into 35B-X

요구 사항: Remove original lifting lugs, modify compartment limit block, change copper busbar outlet, add fixing bracket; 위험: Side pull-out function lost. Battery can only be lifted out for future replacement. Heavy modification, not recommended.

4. 중요한 알림

Distinguish: 35B-X (48V low voltage small tonnage) vs 40~55B-X (309V high voltage lithium large tonnage). The latter cannot use this 48V lead-acid battery at all, do not confuse.

Quick Check List (On-site measurement to confirm fit)

1. Open battery compartment of 35B-X, measure internal length, width and maximum allowable height
2. Confirm battery removal method: side pull-out / top hoisting
3. Record positive & negative terminal position and cable outlet direction