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 rate of self-discharge (1% per month) .Patented battery balancing technology,Built-in over protection circuits provide safety and reliability from fire and explosion. Replace HIL original Toolsbattery:SF144-A, SF 144-A CPC 14.4 V, SFH 144-A CPC 14.4 V, SIW 144-A CPC Impact Wrench, SID 144-A CPC Impact Driver, SFL Flashlight, SFH 144-A, SFH 144-A CPC 14.4V 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.