supply of supply, installation, testing, and commissioning of battery charger suitable for charging 110v, 40ah lead acid battery set, conforming to rdso specification , supply, installation, testing, and commissioning of battery charger suitable for charging 110 v, 40ah lead acid battery set, conforming to rdso specification no. eti/psi/1 (6/81) with latest a&c slips a nd ti/spc/psi/40-150/chgr/1210 or latest. the charger shall be of dual-mode type (float and boost), fully automatic, suitable for continuous duty, and capable of operating on 230v/415v ac (+,-) 10%, 50 hz (+,-) 5% power supply. the charger shall have a nominal output voltage of 110v dc and shall be capable of deli vering a charging current of minimum 8 amperes (considering 20% of battery ah capacity) in boost mode, and 2-4 amperes in float mode, suitable for proper charging of 40ah lead acid batteries. it shall be provide d with necessary protection features such as overload, short-circuit, reverse polarity, and input/output isola tion, along with digital/analog metering for voltage and current, led/alarm indications, and temperature co mpensation for reliable performance. the charger shall be enclosed in a dust-proof, floor/wall-mounted, ip- 21/23 rated metallic cabinet with proper ventilation. make : statcon, hbl, and amara raja. rdso item i d : 3100313001, battery charger for railway s&t installations : upto 20 amp [ warranty period: 30 mon ths after the date of delivery ] ]