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Hi. I use my CE-04 routinely for trips in the neighborhood of 10-25 miles round trip. To maximize battery longevity, I try to limit my SOC for charging to 80%, unless I need more capacity for a longer journey. BMW does not allow a user selectable upper limit for charging sessions. I set a...

rongrimes- I just went out to the garage to verify. The fastener is a T30 Torx.

Bob66- many thanks for your additional thoughts. Your advice makes good sense to me....I'll take it into consideration! Similar to your approach, I have my supplied BMW traction battery charger plugged into a Kasa brand smart outlet. I can control the outlet remotely, schedule any duration of...

Bob66- Thank you for your thoughtful replies. I have been thinking along the same lines as you until I watched this Engineering Explained video that discussed optimum storage conditions for a Li-ion NMC battery pack In my situation, the temps in my garage will exceed 25 degrees C....and could...

CTEK now makes lithium-compatible chargers. Optimate does as well.

Tom: The accessory socket will not take more than 5 amps. Your 7.7 amp draw jacket caused the CANBUS to take the socket offline. If you try again with a vest or gloves that use 5 amps or less, I'll bet it will work.

Hi. Wondering if anyone has experience using one of the Optimate CANBUS-compatible 12V trickle chargers through the CE 04 accessory outlet. My scooter will be garaged in Arizona for several months this summer while I'm not there. Advice I am getting for traction battery longevity is to leave it...

Good technical discussion here about our CE-04's battery chemistry and do's and don's to help maximize battery longevity...

Merv- thanks so much for your post! I pulled down the fairing cover and found the T25 wrench...alas no Phillips screwdriver in North America!

Thanks everybody for all of the advice. I've only had my CE 04 for a few weeks. I'm planning to keep the T25 driver and 8mm socket driver handy if I ever need to get to the 12V battery (including battery cable connections) when I'm out with the scooter. If the 12V battery was totally flat...