Two 2.5 Hotronic Power Plus Batteries with up to 70% longer duration. <B>Features:</B> <LI>Four (4) always-on, continuous heat, temperature-duration settings</LI> <LI>Three (3) settings for comfort and warmth maintenance </LI> <LI>Fourth (4th) setting for a quick blast of heat</LI> <LI>Easy to adjust dialeven in bitter cold temperatures</LI> <LI>Easy to read setting numbers <LI>Compact size overall <LI>Voltage cutoff electronics onboard <LI>Protect against extreme deep discharge <LI>Enhance longevity of cells <B>Only use this battery with the 2.5 or 2.7 chargers or Power Plus chargers. The 2.5 and 2.7 chargers have a red plug and the 2.5 and 2.7 batteries have a red ring around the dial. (The 3.5 Power Plus charger has the blue plug.)</B>
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