2032 battery.
I have had very good luck with CELEWELL batteries.2032 battery.
Japanese brand, price is right, but these are from China and are possibly knockoffs.36 cents for a Toshiba on Ebay in sets of ten. Can't beat that for just one locally.
10 x New Original Toshiba CR2032 CR 2032 3V LITHIUM BATTERY BR2032 DL2032 Remote | eBay
Equivalent Battery Types: 5004LC, BR2032, DL2032, ECR2032, ST-T15. Replaces 5004LC, BR2032, DL2032, ECR2032, ST-T15. 10 Piece Genuine Toshiba CR2032 CR 2032 3V LITHIUM Coin Cell Battery. When you want big power for your small electronics, ToshibaCR2032 to the rescue!www.ebay.com