PREMBROTHERS Maxell CR1620 3V Button Cell (Pack Of 2pcs) use for watches, calculators, sporting goods, games, medical devices, and more Battery - PREMBROTHERS : Flipkart.com
CR2025 3V lithium battery - DSMCZ
New Relay for Yamaha CR-640, CR-840, CR-1040, CR-2040, M-4 w/ Instructions | eBay