Model built, purchased and installed Summer 2013 included three (3) batteries. I have changed these batteries once or twice. The device also started beeping with a new set of batteries, so it's time for a replacement. I bought it again and there are a few small differences. It now uses two (2) batteries and the old backplate still fits, but not as tightly as the new one. Since the unit doesn't bounce three or four inches and fall, I use an old backplate. The unit has a 10 year warranty but please note I have just replaced it. I can only guess what the delivery will be, and it's easier to just get a new one, the manufacturer of course knows.
Dependable 8Ft Rope Ladder Fire Escape - Spring Hooks, Weather Resistant & Lightweight With 2000 Lb Weight Capacity
22 Review
Fire Escape Ladder Hooks (2-Pack) - ISOP Iron Emergency Window Rescue Rope Deployment Carabiner Hook Set, Sturdy & Durable Portable Design.
22 Review
π Safe-T-Alert by MTI Industries 35 Series Dual LP/CO Alarm - 12V, Flush Mount, White, 6-3/8" Width x 2-7/8" Height x 1" Depth
10 Review
25Ft (8M) Fire Escape Ladder With Hooks - Flame Resistant Safety Rope For Third Story Windows - Weight Capacity Up To 2000 Pounds
12 Review
π½οΈ S.O.S. Rations Emergency 3600 Calorie Food Bar (Cinnamon & Coconut, 2 Pack)
8 Review
Clear Disposable Emergency Rain Poncho with Hood for Adults - 20 Pack
8 Review
π SOS Food Labs, Inc. 3 Day Emergency 3600 Calorie Food Bar - 72 Hour Package with 5 Year Shelf Life, Compact Size: 5"H x 2"W x 4.5"L
8 Review
Be Prepared For Anything With Quakehold! 70500 Evacuation Essentials Kit
9 Review