# Changing Battery in the Pistol Grip

To change the battery in the pistol grip, perform the following steps:

1. Twist the end cap of the reader, and take it off.

2. Hold the reader in an upright position, and the battery will slide out of the handle. You may need to shake the reader slightly.

   CAUTION: The battery used in the devices may present a risk of fire or chemical burn if mistreated. Do not disassemble, heat above 60 ºC (140 ºF), or incinerate. Replace battery with Cognex DMA‑HHBATTERY‑01 only. The use of another battery may present a risk of fire or explosion.
3. Put the replacement battery into the slot. The battery has a small triangle on one side. Make sure that you insert the battery into the slot with the side depicting the triangle pushed in first.

4. Put the end cap back on and secure it by twisting it in the direction marked CLOSE. Make sure that the triangle aligns with the circle when the cover is locked.