ITEM NAME:BT168D Smart LCD Digital Batteries Tester Electronic Measure Checker for 9V #gib Store Home Promotion Hot Item Add to Fav.1 x BT168D Smart LCD Digital Battery Tester. for 9V, D type, C type, AA, AAA, button battery. No batteries required to operate. Type: Digital. Temperature range:40℃. Other battery types test: open the test arm, clip battery into the test arm.