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. 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. Fit MIL Tools: 48-11-1830,4932352002,4932399512,MV18B,V18 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 Guarantee:Reject fake labels,strictly follow the capacity label production,up to 12 months warranty,1 month worry-free refund.