Product name:MIL 4VB Voltage:4V Capacity:1500mAh-3000mAh Battery type:MIL 4V cordless tools battery pack Product color:Black Fit MIL Tools: M4 series,M4 1/4 Hex,Screwdriver (2101-20),M4 4V Replace MIL original battery: M4 REDLITHIUM battery 48-11-2001 M4 2101-20 2101-21 2101-22 4-Volt D D-202 D-202B Not suitable for 48-11-0490 Warning: 1. Please fully charge the battery before using this product. 2. Please complete 3 charge and discharge cycles before using this product, that is, fully charge 3 times and discharge 3 times to complete the activation step. 3. If you have any questions, please contact our customer service in time to provide technical support. 4. Normally, we will ship the goods within 2-3 business days after your payment is completed. Usually, it takes 3-7 working days for the express system to update the tracking number into the system after we ship the goods. In most cases, the package can be delivered within 6 weeks. If you do not receive the package in time, please let us know and we will track the package.Guarantee:Reject fake labels,strictly follow the capacity label production,up to 12 months warranty,1 month worry-free refund. PERFORMANCE:Using A-class batteries,non-previous generation batteries,under the same capacity,the running time is stronger and more durable,Quality battery cells with CE and UL approval. Fit MIL Tools: M4 series,M4 1/4 Hex,Screwdriver (2101-20),M4 4V. TRUST WORTHY RELIABILITY:no memory effect, low self-discharge rate (1% per month). Patented battery balance technology, built-in over-protection circuit to provide safe and reliable use technology to protect your use. SAFETY:Using High magnification Brand and New battery,using the latest technology,can prevent overcharging,discharging and overheating,safe and durable,no memory effect,fully compatible with the original battery pack.