Product Description:

This high-performance 52 V 21 Ah (14 S × 6 P) lithium-ion battery pack is built with genuine Samsung 35E cells and a robust 50 A BMS for high-power e-bike and EV applications.
With IPX5 water resistance, a ship-style switch, LED charge indicator, and Reention mini 3-pin DC charge port, it’s designed for durability and reliability in demanding use.

Dimensions: L 368*W 90*H 141mm

14.5*3.6*4.4 inches

Parameter	Specification
Model	FP5221R0 (AXX00750006 – A0)
Watt Hours	1092 Watt Hours
Nominal Capacity	21 Ah (min 20.1 Ah)
Cell Type	Samsung 35E 18650 – 3.6 V 3500 mAh
Configuration	14 S × 6 P
Energy	≈ 1.09 kWh
Standard Charge	58.8 V CC/CV @ 4 A (5 A max)
End-of-Charge Current	800 MA
Max Continuous Discharge	50 A
Peak Discharge (< 10 s)	120 A
Cycle Life	≥ 500 cycles (@ ≥ 70 % capacity)
BMS Protection	Over-charge / Over-discharge / Over-current / Short-circuit / Temperature
Output Connector	XT90 (UL3135 12 AWG lead 300 mm)
Charge Port	Reention Mini 3-Pin DC
Switch	Ship-style toggle power switch
Waterproof Rating	IPX5
Shipment Voltage	51.8 – 53.9 V
Weight	≈ 5.6 kg ± 0.5 kg
Operating Temp.	Charge 0 – 45 °C / Discharge –10 – 40 °C
Storage Temp.	–5 – 35 °C (half-charged; recharge every 3 months)
Short-Circuit Delay	≈ 250 µs

Battery Cut out

Included in Package

1 × 52 V 21 Ah Battery Pack (IPX5 sealed case)
1 × 58.8 V 3 A Charger (US AC plug / Reention mini 3-pin DC output)
1 × XT90 pigtail cable (110 mm lead length)
Shock-absorption mount pads set

Safety & Handling

Use only with 58.8 V Li-ion chargers (CC/CV).
Do not short-circuit, reverse polarity, or disassemble.
Avoid charging below 0 °C or discharging below –10 °C.
Store at ~50 % charge if unused for 3 months or longer.

Charging Instructions

The charger’s indicator light will display red while the battery is charging. Once the battery is fully charged, the indicator will change to green.

How to prolong your lithium ion battery?

Recharge your batteries before they are completely dead.

After every 30 charges, allow your lithium based battery to completely discharge before recharging.

What about warranty?

We provide 12 months warranty
Product quality guaranteed by PAIC insurance

52 Volt

52v 17.5ah Shark Pack (Samsung Cells)

52v 21ah Jumbo Shark Pack (Samsung Cells)

52v 25ah Max Jumbo Shark Pack (Samsung Cells)

52v 9ah Wedge Case (Samsung Cells)

52v 12.8ah Slim Shark Pack (LG Cells)

52v 14ah Aluminum Cased Battery (Samsung Cells)

CYC A-Series eBike Battery Packs