Battery Type: Li-ion, Voltage: 18V and 20V, Capacity: 3000mAh.The especially important that the battery chip is LG or SAMSUNG. Professional replacement battery compatible with 18V WA3512, WA3511, WA3512.1 and 20V WA3520 WA3525 WG163 battery. Compatible with RW9161, Cordless Tools WG630, WG322, WG543, WG163,WG151, WG151.5, WG151E, WG155, WG155.5, WG251, WG251.5, WG251E, WG255, WG540, WG540.5, WG540E, WG540E.1, WG540E.5, WG890, WG891, WU287, WU289, WU381, WX163, WX164, WX164.3, WX368, WX502, WX502.1. No memory effect and low self-discharge for maximum productivity and less downtime. CE, FCC and RoHS certified，we provide one year warranty, 90 days replace and retund, and 7*24 hours friendly and timely customer service. Advantage:
Uses the highest quality LG or Samsung cells, excellent performance.
Overcharge and overdischarge protection to increase the life of the battery.
No memory effect, can be charged or discharged as needed without loss of capacity.
Low self-discharge for maximum productivity and less downtime.
No pollution to the environment.

Specifications:
Voltage: 18V
Capacity: 3000mAh
Battery Type: Lithium-Ion

Replacement Part:
Compatible with WA3512, WA3511, WA3512.1

Compatible Models:
RW9161, WG151, WG151.5, WG151E, WG151E.5, WG155, WG155.5
WG251, WG251.5, WG251E, WG255
WG540, WG540.5, WG540E, WG540E.1, WG540E.5
WG890, WG891, WG891E
WU287, WU289, WU381
WX163, WX163.1, WX163.2, WX163.3, WX163.M
WX164, WX164.3
WX368, WX368.1
WX502, WX502.1

Note:
It's recommended that the battery should be fully charged and discharged 3 times after you receive the battery.
For transport safety, our batteries are not fully charged before leave the factory.
After use, please charge the battery after cooling.
Battery charger is not included.

Warranty:
Our batteries come with 90 days money back.
You can contact us anytime from the date of purchase, we will try our best to provide you the best service.