LCD Digital Battery Charge Tester Compatible Batteries: AAA, AA, C, D, 9V, 18650, button cells, etc Supported Voltages: 1.5V / 3.7V / 9V / 12V

Say Goodbye to “Guessing” Battery Levels—Just Plug It In to Find Out
Is your remote control unresponsive because the batteries are dead or the device is broken? Did your toy suddenly stop working—are the batteries drained or is there a loose connection? With a pile of old batteries all mixed together, which ones still work and which ones should you throw away?

The Baolian Battery Tester puts an end to guesswork.

No complicated steps, no extra power source needed—just place the battery on top, and the LCD screen instantly displays the real-time voltage and charge status. With three indicators—GOOD, WEAK, and POOR—you can see the charge level at a glance. Ease of use is what really matters.

One device for all—covers 99% of household batteries
From the smallest button cells to the largest Size 1 batteries, from common Size 5 and Size 7 batteries to 9V block batteries and 18650 lithium batteries—one tester handles all the batteries in your home.

Battery Types: Supported Models
Size 5 Batteries: AA, HP7, MN1500, UM3
Size 7 Batteries: AAA, HP16, MN2400, R03
Size D Batteries: D, HP2, MN1300, SP2, R20
Size C Batteries: C, HP11, MN1400, LR14, UM2
Size 8 Batteries: Type N
9V Batteries: PP3, MN1604, 6F22, 006P
3.7V Lithium Batteries: 18650
1.5V Button Cell: Button cell
12V23A    12V Alkaline Battery
Compatible with alkaline, carbon-zinc, and rechargeable batteries alike.

Six Major Advantages That Make Testing So Simple
❶ Supports Multiple Models — Covers a wide voltage range from 1.5V to 9V, with all-around testing for AA, AAA, C, D, 9V, 18650, and button cells.

❷ LCD Battery Level Indicator — High-definition LCD display showing voltage readings and three status levels (GOOD/WEAK/POOR), easy to read for both seniors and children.

❸ No Batteries Required — The tester itself requires no batteries or external power source; it operates using power from the battery being tested. No power drain, no energy consumption—ready to use whenever you need it.

❹ ABS Insulation — Made from high-quality ABS engineering plastic, it offers excellent insulation, ensuring safety and durability. The matte-finish casing is slip-resistant and impact-resistant.

❺ Convenient Testing — Plug and test—no need to switch modes or calibrate. Operate with one hand and get results in 3 seconds.

❻ Compact Design — Weighing just 33g, it’s lightweight and portable, taking up minimal space when carried with you.

Who Needs This Tester?
Home Users: Remote controls, digital scales, thermometers, alarm clocks, toys… Too many batteries at home and can’t tell which ones are good or bad? One test tells you everything.

Tech Enthusiasts: Keep track of the health status of your 18650 lithium batteries and rechargeable batteries at all times.

Battery Stockpilers: No more mixing new and old batteries—accurately identify which ones are still usable.

Environmental Advocates: Avoid accidentally discarding good batteries, reduce waste, and do your part for the environment.

Product Specifications
Item    Specifications
Product Name: Digital Upgrade Edition · SecTest Battery Manager
Weight: 33g
Material:    ABS Insulated Plastic
Display Type: LCD Digital Display
Power Supply: No external power required; powered by the battery being tested
Supported Voltages: 1.5V / 3.7V / 9V / 12V
Compatible Batteries: AAA, AA, C, D, 9V, 18650, button cells, etc.

Say Goodbye to Battery Anxiety—Start with This Device
Instead of being caught off guard by a “dead battery” at a critical moment, take a few seconds to check the charge level in advance.
Battery Tester—Gives you a clear and precise understanding of every battery’s charge level.