This is a kind of top quality 21V rechargeable lithium battery, you have two different capacities to choose from, you can choose according to your demands. There are two different capacities of 5pcs lithium battery cores or 10pcs lithium battery cores for you to choose, you can choose according to your demands. Built-in LED power indicator helps you work easier, it's time to recharge, help you monitor the battery charge status and check if the battery is in good condition.

Features:
Rated voltage: 21 V.
Battery type: 5 x 1500 mAh lithium battery cores, 10 x 1500 mAh lithium battery cores (optional).
Item size:
Type of 5 lithium battery cores: 120 x 76 x 50 mm/4.72 x 2.99 x 1.97 inches.
Type of 10 lithium battery cores: 120 x 77 x 70 mm/4.72 x 3.03 x 2.76 inches.
Power adapter: 87 x 50 x 69 mm/3.43 x 1.97 x 2.72 inches.
Item weight:
Type of 5 lithium battery cores + adapter: 388g/0.86lb.
Type of 10 lithium battery cores + adapter: 634g/1.40lb.
Package size: 160 x 140 x 100 mm/6.30 x 5.51 x 3.94 inches.
Package weight:
Type of 5 lithium battery cores: 410g/0.90lb.
Type of 10 lithium battery cores: 645g/1.42lb.

Package contents:
1 x replacement Li-ion battery
1 x battery adapter