4x ER26500 LS26500 9000mAh 3.6V Li-SOCL2 C Batteries for Water Meters | eBay
Amazon.com: EEMB 4Pack ER26500 C Size 3.6V Lithium Battery with Solder Tabs High Capacity Li-SOCL₂ Non-Rechargeable Battery LS26500 SB-C01 TL-2200 for Electricity Meter, Wireless Electric Tools, Signal lamp : Health & Household