2X the battery life for the Caterpillar Cat B15Q phone with this extended battery by Mugen Power - The Gadgeteer
Rear Back Cover For Cat B15q Battery Door Hosing Backcover For Cat B15q Original Caterpillar Free Spipping Aaa Phone Replacement - Mobile Phone Housings & Frames - AliExpress
BOKA B10-2 Akku Batterie Battery Charger for Caterpillar CAT B15, B15Q, B15Q AM | eBay
Amazon.com: Accessory USA LCD Battery Charger with USB Port for B10-2 CAT B15 B15Q B15Q AM Mobile Phone : Electronics