Review on 🔋 OptiMATE 4 CAN-bus 8/9-step 12V 1A Battery Charger-Tester-Maintainer - Ultimate Solution for Battery Saving by Kaushik Sokolowski

Update 11/01/2021: Found on FB that this charger does NOT work properly with K1600. The information is in Madarin, but I translated it for the people here using Google Translate. The translation is not perfect, but should be understandable. For this reason I am reducing my rating to one star. "The OptiMate 4 Dual Charger for BMW Can-Bus from L2 Heavy Machinery/carTecMate understands the state of charge of the K1600 battery. We know that the unloading speed of this machine is pretty fast. According to the dealer report, the battery will be empty in about 2-3 weeks. After our tests we also made sure that the ZFE/CAN bus system of the K1600 differs from other BMW bikes. The existing dual-mode OPTIMATE 4 may not connect automatically, but can be charged from a 12V outlet when the switch is open. However, once the battery is fully charged, we cannot guarantee that the battery will continue to be used. Due to the CAN bus system, determine whether the battery is fully charged, and automatically close the switch after the battery is fully charged. As such, a K1600 owner should open the switch at least once a week to ensure the battery is operational." I bought this last month to charge my 2018 BMW K1600B in CAN-Bus mode. On the first tries LED 1 & 7 will illuminate upon completion of a full diagnostic cycle indicating poor battery condition according to the manual.After a few power up cycles it will eventually enter the stabilized state with LED 1 & 5 illuminated - in 'Hold 365' mode. However, this only lasted about 3 days before LED 5 went out and LED 7 came back on without anyone touching them.The guide is useless in helping users figure out what to do to fix this inconsistency It feels like I have to turn it on and off every few days for this thing to work, defeating the purpose of buying it in the first place.