The 3.6V & 43Ah (155Wh) LiPol cell is a high-capacity external battery for Super-Beacons. It increases the beacon’s work time up to ~43-50 times as compared with the time on the internal battery, which enables the working time up to 1-2 years depending on the update rate and other settings.
Recharging takes 48h with base charger. During this time, the Super-Beacon works on its internal battery. Thus there is no interruption for the maintenance.
Notice that LiPol batteries are considered as dangerous goods. Their shipping is expensive and may significantly contribute to the total cost of the battery.