Digital Battery Capacity Tester Battery Colour Coded Meter Indicate Volt Tester Checker BT168 Power e ssential information: Power supply: no power supply is required Measurable battery types: various button batteries, No.1, No.2, No.5, No.7, 9V square batteries, etc Function: It can measure whether the battery is fully charged. The color of the indicator light is as follows: red (RE-PLACE replacement or RE-CHARGE charging): If the indicator pin points to this block, the battery under test needs to be replaced or recharged, that is, the battery is basically useless; Yellow (LOW): The battery power is low, but some appliances can still be used Green (GOOD): The battery is fully charged usage method: 1. The 9V battery is directly connected to two test holes on the side of the tester; 2. For other batteries similar to No. 5, please open the test arm at the top of the tester with a hand board and clip the battery in. Measurable battery: 1, 2, 3, 4, 5, 9V battery, button mercury battery. *Material: ABS. *Size: 11cm long x 6cm wide x 2cm high. 5cm. *Color: black. *Weight: 50g/piece* This "battery tester" definitely allows you to connect with the battery, thoroughly understand the residual amount of battery power, and support the commonly used "No. 1, 2, 3, 4, 5 batteries, 9V square batteries, button mercury batteries". No external power supply is required for testing while in use. It is compact and easy to carry. The built-in power pointer can display the strength of the power, so that you can know the status of the battery, saving money, time, and environmental protection. *Let you connect with the battery, save money, save time and protect the environment. *Small size, no external power supply is required for the measurement when in use. *It supports 5 commonly used battery specifications. *The built-in pointer can display the power strength, ensuring that it is easy to understand. _x000D_