OPzV Battery Beijing XD Battery Technology Co., Ltd.
https://www.xdbattery.com/OPzV-Battery-2-800AH-176.html
OEM/ODM Warranty:3years Voltage:2V Weight:60kg Dimensions:191*210*464mm Color:White or customization Maintenance Type:free Application:Communication, Traffic, IT, Financial, UPS, Solar, Radio, Electr...
https://www.xdbattery.com/China-OPzS-OPzV-Battery-2V-800AH-Tubluar-Gel-Long-Life-Battery-202.html