Steffano Posted October 17, 2019 Share Posted October 17, 2019 I recently put a external battery on my ninebot es1. Runs fine but when I charge the scooter the main battery does not charge with the external battery. Any advice would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
alcatraz Posted October 21, 2019 Share Posted October 21, 2019 Did you connect the second battery in parallel with the first? Do they discharge together? It shouldn't be possible to connect two batteries together in parallel if they have different voltage (charge). So I don't quite understand how only one is being charged. It would mean their voltages stray from eachother. As a test what happens if you disconnect the second, attach the charger, then reconnect the second? Do they charge together then? Quote Link to comment Share on other sites More sharing options...
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