{Compatible} Suitable for Worx ( 12 V) almost all power tools of this type of interface,WU127 WU151 WX3827 WA3503 WA3509 WX540.3 WX677 Rockwell KRGRT-PN-7734031 RW9300(For details,see the introduction below,you can quickly filter by "Ctrl + F") {Authenticity} Battery pack consists 3 of 3.6V 3.0Ah high quality Li-ion cells in series, total voltage 12 V, total capacity 3.0Ah3000mAh, battery weight 195g. power 36watts per hour. Ensure the authenticity and validity of the volume annotation. {Convenient} high-quality mold, perfect fit for the original tool interface, and the original battery performance, size, contact consistent, PC / ABS material, drop-proof, wear-resistant, flame retardant, easy installation and removal, interface precision, non-slip design. {Warning} (please observe the original battery interface and power before purchase is consistent with our product pictures, some original models exist in numerous styles and are not compatible with each other) {Safety} with high quality integrated motherboard for trouble-free operation. Passed CE, FCC and RoHS certification. High quality battery can stabilize the voltage, prevent overload, overheating, overcurrent, short circuit and prolong battery life. This product has passed the strict factory inspection. (Long distance transportation may cause product failure, please use after testing and charging outdoors or in a safe place). With 13 years of OEM experience, we have 4 production lines and can produce nearly 1,000 varieties of batteries, using brand new high quality cells and chips to ensure the brand newness and quality of our products.Replaceable battery for worx or Rockwell 12v power toolscordless drill/drill driver：WX125 WX382.2 H3, WX382.3 WX126 WX128.2 WX382 WX382.4 WX382.7 WX382.M WX382.M1 WX382.M2 WU127 WU128 WU130 WU131 WU132 WU128 WU151 WU127 WA3503 WA3504 WA3505Rockwell : RK2510K RK2510K2 RK2516K RK2512Kat RK2510K2.1 RK1001K2Hammer/ impact Drill：RK2513 K2 WX382 impact wrench/Driver：RK2515 K2 3RILL WU280Circular Saw：WX521.1 WX521 WX521.1Jig Saw with：WX540.3 WX540 RK2516Reciprocating saw：WX540 RK2516Power Tool Combo：RK1001K2Multifunction Oscillating Tool：WX677 WX673 WX673.3 WX673.M WX677.7 RK2514K2working lamp  Flashlight：WU025 RK2518Charger:RW9400 WA3725 WA3846 WA3855 WA3845 Replacement Part numbers:Worx 12V WU127 WU151 WX3827 WA3503 WA3509 WX540.3 WX677 batteryRockwell 12V RW9300 WA3503 WA3504 WA3505 RK2514K2 RK2510K RK2510K2 RK2515K2 RK2516K KRGRT-PN-7734031 batteryMax discharge current 10C (continuous, C=capacity)li-ion battery full voltage 4.2V Standard Voltage3.6Vtermination voltage2.75V（Chip protection stops output when lower than）NiCd-NiMH battery total voltage 1.4V standard voltage 1.2V termination voltage 0.9VDifferent brands of tools have different voltage Marking practices, 10.8V and 12V batteries Reasonable within a certain range, such as shared (tool voltage (such as 10.8V or 12V) / 3.6V or 3.7V or 669V as an integer, the value is the number of batteries in parallel)Warning: please remove the battery for a long time without use, too long discharge will lead to irreversible damage to the battery