Specification:Voltage:7.6V Capacity:41.8Wh/5500mAh Battery Type:Lithium Ion Conditiin:100% brand new. Compatible Part Number:45121212P 45121212P NV-3978115 NV-3978115-2S 3978115 3978115-2S. ANCBD Promise: We provide professional factory direct selling high-quality power products and high-quality customer service. The manufacturer is 100% brand new. Overcharge and over discharge circuit protection; Overheating and short circuit protection; It can be recharged up to 500 times within the battery life, and the quality problem is absolutely guaranteed. ANCBD after-sale service: Friendly customer service respond within 24-hour.on.We promise to solve any quality problems for our customers at the first time. Please feel free to contact us at any time. Reminder: (1) It is best not to completely drain the battery when charging. Discharge the new battery to 5% (instead of 0%), then charge and cycle 3-4 times to fully charge the new battery. (2) Remember to fully discharge and charge every