To access the battery compartment, slide the door downward. The battery should only be replaced by a Lightspeed AA rechargeable sensing battery (part #BA-NH2A27) or any NiMH rechargeable battery but you’ll need to remove the branding wrapper off the battery.
* Replacing this battery with a regular AA battery will result in the battery exploding and/or a fire. Please do not put regular batteries in the Redmikes.
Pro Tip: How to prolong the life of my (NiMH) battery?
Do not keep battery in charger for more than a few days, discharge to 1V/cell every 1–3 months to prevent memory. Batteries gradually lose their maximum energy capacity if they are repeatedly recharged after being only partially discharged.