User's Manual

Troubleshooting

When you turn on the keypad, if the keypad’s LCD shows abnormal or

nothing, check your battery first. If the battery is working fine, try to find

an acicular metal and plug into the reset hole (in the back of the keypad).

Then the keypad will work normally. If the problem was still unsolved,

please contact the technical support.

Battery Caution:

1. Risk of explosion if battery is replaced by incorrect type. You must

need to use the Nickel-Metal Hydride rechargeable battery.

2. The battery may fail or explode when shorted, overcharged or

charged with incorrect polarity.

3. Do not dispose of in fire and prevent explosion.

Battery LED Status

Battery Low: LED flash (0.4 sec ON, 0.4 sec OFF)

Battery Full: LED ON

Charging: LED flash (0.8 sec ON, 0.8 sec OFF)

Charging and discharging battery Note:

The calculator keypad is powered by rechargeable battery.

The installed battery could be discharged during shipment and

storage. Users are required to complete charge the battery before

use.