Polymer Li-Ion Battery: 51.8V 21Ah (1088 Wh. 40A rate, 1055275-2C) Rechargeable Battery Pack

• 51.8V 21Ah pack is made by 14 pcs high quality Polymer Li-Ion cell of 3.7V 21Ah  
• Wrapped by heavy-duty Heat shrink tube

• One 40A PCM with balance function is installed in the battery pack to balance charging and protect battery module
• Must wait min of 30 minutes after battery is fully charged to allow the PCM to perform balance function on all the cells within the pack.
• Charging terminal:   6" 16 AWG with Standard Male Tamiya plug.
• Discharging terminal: 6" 12 AWG open end wire. Need connector for DIY? Please click here to order.

    11.0"(280mm) x 6.0"(154mm) x 2.9"(74mm)   

• You shall choose our chargers to recharge this battery pack. 
• Universal Smart Charger (18A, 29.6V-58.4V Cut-Off) for 36V-48V SLA , 29.6V-51.8V Li-Ion/LiMnNi (8-14 Cells),38.4V-51.2V LFP(12-16 Cells) -- CE listed. The estimated charging time is about 1.75 hours.
• Must DIY charger's connector to match up with battery pack's charge terminal.
• Must set charging voltage to 58.38VDC
• 51.8V 3A Smart Li-Ion battery charger  + the connector adaptor . The estimated charging time is about 10.5 hours. 

• Replace 48V NiMH battery pack with much lighter weight  for drain rate <40 amp
• Autonomous submarine to drive a 48V DC motor .
• Not suitable for Scooter, E-bike, skateboard ect.
• Please click here to see the Comparison Poly-Li pack vs NiMH / SLA to know the advantages

• Warning:  Please wait 30 minutes after charged to allow PCM to balance the cells to achieve the best performance
• Strongly suggest you put the battery pack into a water / fire resistant box for safety use
• For safety warning please see the link here
• California residents: Warning: Cancer and Reproductive Harm - See Prop 65 Warnings
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