Contech Instruments Ltd manufactures Battery Backup Unit. Contech Instruments Ltd is an ISO 9001: 2008 certified company. The Company also manufactures various types of laboratory balances, moisture balances, gem and jewellery balances, super market scales, health scales, industrial scales, crane scales,ÿelectronic weighbridges, scales for special applications, etc.The Battery Backup Unit is an online uninterrupted power supply providing adequate voltages for the operation of the balance in case of power failure.ŸThis Unit incorporates sealed maintenance free lead acid batteries with a charger and under voltage and over voltage protection circuit.