Here is the inside of the focus jam2 battery , may be of interest to some people. Some corrosion starting in the last picture. | EMTB Forums
erledigt - FOCUS T.E.C. Pack für Shimano STEPS E8000 Akku (Zusatzakku) + Interface SM-PCE1 - Pedelec-Forum
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Online Focus T.E.C. Pack - external battery sale up to 60% | free delivery over $80at outdoorsportsale.com
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