par glnc222 » Lun 26 Mar 2018 04:18
The Lithium Power Inc, / AnewPower lithium battery for original Botvac with NiMh battery is not as good a replacement as the XV Neato version. The lower 12v system in the Botvac does not divide easily into the higher cell voltage of lithium ion cells, and only a portion of the charge capacity is used in the lithium Botvac battery. To compensate, the battery is made with a much larger capacity than normal. This could affect the lifetime of the battery as this the small top portion used deteriorates. A proper lithium battery was made by a user using LiFePo4 chemistry cells, with lower voltages which match the 12v system better -- and which also lasts much longer than regular lithium batteries (used in electric bikes, robotic lawn mowers -- the lower energy density requires too many cells for much vacuum use, but newer versions happen to fit the Botvac). Note the newer Neato Connected series with OEM lithium ion batteries uses the higher voltage of the old XV series, for proper lithium ion system same as originally used by Vorwerk.