replacement battery for apc back ups es 350 inovel power replacement battery for apc back ups es 350 our casil maintenance-free lead-acid batteries are maintenance free, eco-friendly and have low internal resistance. the batteries are widely applied to emergency lamps, portable lamps, electric scooters, electronic instruments, ups systems, gps systems, etc. cycled use hi-fi equipment, portable lamps, electric swivel chairs, test equipment, medical devices , traffic, mobile phones technical performance closed structure: casil battery has unique structure and sealing technology effectively keep the battery from leaking so that the battery can work under various circumstances electrolyte suspension system: the electrolyte inside adopts electrolyte suspension system combined of porous glass fiber materials and pole plates and the electrolyte is completely absorbed and accommodated. no silica gel or contaminated products are used. low-pressure valve system: all the casil batteries are equipped with safety exhaust valves, which automatically exhaust when the pressure reaches 0.98~196.1kpa, therefore, there is not too much gas stocked inside the battery. high-quality grid: the high-quality lead-calcium-tin alloy grid, whether used in float charging or recycling, or even through many times of over-discharge, keeps strong performance and long service life float charging life: casil high-performance series of batteries can be used for 2-4 years for float charging decovery role of deep-discharge: casil battery can only recover its capacity by deep discharge scope of application: float charging,burglar/fire alarms,solar power,emergency lights,office equipment,telecommunications systems,computer,currency detectors,uninterruptible power supply,hi-fi equipment,portable lamps,electric chairs,test equipment,medical devices,traffic,mobile phones hi-fi equipment , portable lamps, electric swivel chairs, test equipment, medical d