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Ebike Polar Bear Dual Battery Combiner 50A 2 In 2 Out Up To 2000w with 2 50cm xt60 cable with jacket This unique Polar bear ( Battery Combiner’) combines the power of two batteries, by allowing both to power your bike at the same time! This device have xt60 2 in 2 out , The batteries can be of different Ah capacities; they will discharge in unison, once the voltage is equal between them. HOW THEY WORK: During use the battery with the higher voltage will power the bike until such time when both batteries have equal voltage, then both batteries will power the bike simultaneously, giving you the combined current of both. The batteries should have good overlap in voltage (ideally the same). For example, combining a 48v and a 52v battery will work, since there is little overlap in voltage between the two batteries. A 48v & 72v battery have no overlap, thus they would not work together. The capacity (rang) while using this device can be greater than when using each battery sequentially, since the bike can then operate at a higher average voltage (the “Sweet Spot”). Safely connects two batteries together for added range Voltage Range: 12v - 84v Voltage drop <0.25v XT60 Connectors (2in 2 out ) with two battery inputs, two controller output All units are fully tested before send Dimensions of the Dual unit: 2x3” Additional Notes: Dual unit has two identical outputs (you can use either one or both for two load devices) ADDITIONAL NOTES: NOTE-1 : The Devicemay get warm during use; airflow is crucial for it to remain cool. NOTE-2: The P combiner is not covered for replacement, if rated amperage is exceeded or no airflow is available NOTE-3: “REGEN” circuits will not work with this combiner SIZING GUIDLINES: 50A - Applicable to most bikes up to 2,000w