The Hotronic M4 Power Plus Battery Pack, with 4 NiMH cells, is the longest lasting battery in the Hotronic line.



Temperature & Duration Chart

Setting	Approximate Average Temperature		Duration Range
	°F	°C	M4 Power Plus
1	83 - 89	28 - 32	19 - 21 hrs
2	96 - 106	36 - 41	7 - 9 hrs
3	105 - 116	40 - 47	5 - 6.5 hrs
4	135 - 144	57 - 62	2.5 - 3.75 hrs
Above average temperature and duration ranges are determined from test results with Battery Packs in ambient conditions of +4°F to -9°F.