SMALL & PRACTICAL - Simple but effective little battery tester checker(Model: BT-168D) , compact size and lightweight,easy to carryTESTING DEFFERENT BATTERY TYPES - It works with standard and rechargeable household batteries: AA, AAA, C, D, 1.5V,9V and button typeREQUIRE NO BATTERY TO OPERATE - Easy-to-read ,the analog display needle moves on a color-coded, calibrated scale to quickly identify "good" (green), "low" (yellow), and "replace/recharge" (red) battery status. No batteries required.It is activated by the battery being checkedPERFECT FOR HOME USE - Great small tool can tell you if your battery is good, low, or needs to be replaced.A must buy for anyone who uses regular or rechargeable batteries on a regular basis Battery Tester Checker for 9V 1.5V and AA AAA Cell Easy-to-read , digit indicates power level. Checks power level of 9V and 1.5V batteries Can quickly test the capacity of your battery. Test multiple sizes of batteries in one unit Lightweight and compact, measures 11 6 2.5 cm The battery tester tests 9V,1.5V,AA,AAA,C,D and Cell Button Type batteries. Tester does not require any internal batteries to operate.