Open the battery compartment cover on the back of the BG meter;
Press the black film in the middle of the two batteries to release the batteries, then remove the old batteries from both sides;
Place 2 new batteries with the "+" side facing up;
Close the battery compartment cover.

The Accu-Chek Guide BG meter uses 2 pieces of CR2032 Lithium Coin Battery.
The following battery brands are recommended: Panasonic/Energizer/Duracell/Sony.

No, the BG meter data is saved.

When the battery symbol appears on the BG meter display, it indicates the battery is almost empty; replace it as soon as possible.