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12V 21Ah Lithium-Ion Rechargeable Battery - Image One
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Robotics & Electronics > Batteries, Adapters & Power Supplies

12V 21Ah Lithium-Ion Rechargeable Battery

Item#: 16948  
List Price:$179.99
You Save: $40.99 (22%)
IN STOCK Ships in 1-2 work days
from our Lakewood, CA warehouse.

Only 4 left in stock - order soon.

This high-capacity Lithium-ion rechargeable battery is great for your next solar energy science project, electric vehicles and bikes, scooters, golf carts and more.


  • Battery Type: Li-ion
  • Nominal Capacity: 21 Ah (21,000mAh)
  • Nominal Voltage: 11.1 V
  • Battery Dimension: 64 x 98 x 150 mm (2.5 x 3.9 x 5.9 inch)
  • Battery Weight: About 1300g
  • Cycle life: More than 2000 times, DOD at 80%
  • Input Charging Voltage: 12.6 V
  • Input Charging Current:Standard 1A, fast 5A
  • Continuous Discharging Current:8A, Around 100W
  • Charging Temperature: 0 ~ 45 C (32 ~ 113 F)
  • Discharging temperature: -20 ~ 60 C (-4 ~ 140 F)
  • Storage temperature: -20 ~ 45 C (-4 ~ 113 F)

WARNING: This lithium battery has a BMS - Battery Management System (protection electronics) board built-in so it can only be connected in parallel. Do not connect two or more of these batteries in series.


At our online store, we prioritize providing our customers with brand new and high-quality rechargeable lithium batteries. Due to the nature of batteries, we do not accept returns on these batteries as we cannot verify their usage or condition after purchase. By only selling new batteries, we are able to offer competitive pricing and ensure that all of our customers receive only the best products. Thank you for choosing us for your rechargeable battery needs.

Due to the nature of this product and to protect our staff and customers we do not accept returns on this product. You will not be allowed to return this product.

18 +
Approx. Ship Size:
6.00 x 5.00 x 5.00 inches
15.24cm x 12.70cm x 12.70cm
3 lb 2 oz
1.42 kg

Small parts. Not for children under 3 yrs.
Accidentally shorting (connecting the red and black wires) of any battery holder with batteries installed can result in fire and battery explosion!

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