Supply of batteries to UPS and Inverter

All C Class SOs will be supplied with batteries to the UPS and inverter.  To the UPS, in place of existing six batteries, three batteries of high capacity will be supplied and to the inverter four batteries will be supplied.  Vendor has already started supplying batteries.  Vendor will take old batteries and supply new batteries.  SPMs are instructed to take invoice from vendor and see that the old batteries taken by vendor is mentioned in the invoice and send  a copy of invoice to DO.