This battery is in the heart rate monitors (Ant+ and Bluetooth). You can order it as a spare.
CR2450 Remote Battery Batteries for Remotes
CR2450 Replacement Battery – Stumpf Welding Supplies
used in the Viking 1840, 2450, & 3350 Auto Darkening Helmets, (2 Batteries req'd for 1840, 2450, 2450D, & 3250D FGS - 1 Battery req'd for 3350
CR2450 Replacement Battery
CR2032 / CR2450 BATTERY CONTACT for CS・CSS・WC - CST, PRODUCTS
Beidongli, a professional battery manufacturer, mainly produces high-end batteries for global market. Manufacturer Beidongli. Perfect backup battery
Beidongli CR2450 Battery 3V Lithium (6Pack)【5-Year Warranty】
cOMPETITIVE AND TIME-SAVINg: bulk Battery cR2450 is much more more competitive than the local store 100 counts with extra 5 Pcs ones as spare parts
WANZELONYO CR2450 3V Lithium Battery Bulk CR2450 Coin Cell 600mAh 100 Count
10pc Pkcell Cr2450 3v Lithium Battery Ecr2450 Dl2450 Br2450 Button Cell Batteries For Watches Toys Calculators - Button Cell Batteries - AliExpress
PKCELL CR2450 3 Volt Lithium Battery 5-Pack, Long Lasting Batteries - Key4
Panasonic CR2450 Lithium Coin Cell Battery bbmbattery – BBM Battery
Energizer 2450 Battery 2450BP-2
4) CR2450 Coin Cell Batteries - Party Brights