The AGM RITAR RT640 battery is used in devices with low power consumption. Therefore, it's essential to choose a high-quality battery to ensure reliable, long-lasting operation. The AGM RITAR RT640 is your choice! Application:• uninterruptible power supplies• in telecommunications and industrial equipment;• in backup lighting systems• as part of video surveillance, alarm, access control systems• in networks of fire and security automated systems Characteristics:• number of elements - 3• terminal type - F1• battery type - AGM• voltage - 6 V• internal resistance - 24 mOhm• capacity - 4 Ah• maximum discharge current - 40 A• maximum charging current - 0.4 A• charging voltage in cyclic mode - 7.30 V ~ 7.40 V at 25 ° C• charging voltage in buffer mode - 6.85 V ~ 6.95 V at 25 ° C• operating temperature, ° C: +15...+50• device dimensions (L x W x H) - 70 x 47 x 99 mm• shelf life: 6-8 years• weight - 0.62 kg (Tolerance ± 5.0%) Please note! Failure to comply with voltage and charge/discharge currents may damage the battery and void the warranty.