Sealed, maintenance free, lead-acid battery, VRLA type, with 5 years designed life (according to Eurobat: 3-5 years - Standard Commercial).
Designed for standby use in uninterruptible power supplies (UPS).
The internal resistance of this battery is lower than for EP 7 - 12 but container dimensions are the same.
That is why EV 9 - 12 has higher capacity and much better constant power and constant current discharge characteristics, especially for short discharge times (5-20 min.)