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LCD Display Battery Capacity Indicator Voltage Tester 0%-100% Lead-acid Li-ion Battery Capacity Tester 7.4V/12V/24V

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LY7 is a kind of voltage type battery capacity tester, it can test the voltage and capacity of battery, and display them with intuitive battery symbol and percentage.  Users can know the state of battery in time. LY7 has function of memory. It is suitable for mobile and portable equipment, e-bike, balance cars, cleaning machines, instruments, ups and so on.

LY7 is suitable for lithium batteries, lead-acid batteries which working voltage is from 5V to 30V.

Basic Parameters:

No. Parameter Min Type Max Unit
1 Working voltage 5   30 V
2 Working dissipation   8 10 mA
3 Sleep dissipation     15 uA
4 Voltage accuracy   ±3.0  
5 Capacity accuracy   ±3.0  
6 Backlight on current   40 50 mA
7 Backlight off current   30 40 mA
8 Temperature range 0 20 35
9 Weight 23 g
10 Size 57×30×12 mm

LY7 provides a connector consists of plug, black line and red line. Connect the black line to the negative, the red line to the positive, the plug to the socket of LY7. Then, power on or turn on the switch, it will be work. As shown below:

LY7 is fixed by buckles, so it is easy to install. First, open one rectangular orifice on the panel according to the size. Then put LY7 into the rectangular orifice, and make sure the buckles are locked.

Use Setting:
1>. When turn off,hold on the“K-”key on the back and power on. LY7 displays the present specification. Use“K+”and “K-”keys to adjust specifications, select suitable specification you need, then press the“OK”key on the front. LY7 will be work normally (correspond code as below form).

No. Lithium-ion Code Lead-acid Code
1 2 cells Li2 12VPb Pb1
2 3 cells Li3 24VPb Pb2
3 4 cells Li4    
4 5 cells Li5    
5 6 cells Li6  
6 7 cells Li7


2>. Press the“K+”key on the back to enter function setting mode. LY7 has two functions : F0 and F2. Use the“K+” key on the back to select F0 and F2. Then press the“OK”key on the front, the selected function will run. The default function is F2.

F0: Backlight on: LY7 run all the time, LCD and backlight always on.
F2: Dormancy: LY7 enter a dormancy state (<15uA) after display 10s, LCD and backlight turn off. Press the “OK”key, LCD and backlight turn on 10s.

3>. Press the “K-” key on the back to enter display setting. LY7 has three kinds of display mode. Use the“K-”key on the back to change the display mode. Then press the “OK” key on the front, the selected mode will run.

V&%: Voltage and percentage display: LY7 can display the current voltage or the current percentage of capacity. Press the “OK”key on the front can change the display content.
V: Voltage display: LY7 only display the current voltage.
%: Percentage display: LY7 only display the current percentage of capacity.

One connector with two lines, 20mm in length. If it is short, please lengthen it by yourself.

Attention and Warranty:
1>. LY7 cannot be exposed in the sun for a long time or in the environment with large amounts of ultraviolet radiation when using or storing, particular in winter(<-20℃) and summer (>60℃), otherwise it will shorten the life of LCD.
2>. Within one year, any fault caused by non-artificial reason we should maintain it freely.




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LCD Display Battery Capacity Indicator Voltage Tester 0%-100% Lead-acid Li-ion Battery Capacity Tester 7.4V/12V/24V