Real-world e-bike battery maintenance: degradation, winter storage charge levels, he

[Eric35]

I rely on my e-bike for my daily commute and weekend rides, and I want to make sure I'm taking proper care of the battery to maximize its lifespan and performance. I've read conflicting advice about charging habits, like whether to keep it plugged in all the time or only charge it when it's nearly depleted. For long-term e-bike owners, what has been your real-world experience with battery degradation over time? What specific e-bike battery maintenance routines do you follow regarding storage charge levels for winter, cleaning the contacts, and managing heat exposure during and after charging?

[EdwardZW]

From my own experience, I don’t leave the battery plugged in all the time. I top it up before rides and store it around 50–60% SOC if I won’t ride for more than a week or two. Keep it in a cool, dry place and avoid extreme heat or freezing temps. If you’re not riding for weeks, check the level every month or so and top up back to storage level.

[JonathanT]

Over a couple of years, I’ve seen a noticeable but gradual degradation. My pack dropped ~12–15% capacity after ~2 years with moderate heat exposure; in cooler storage, it held up better, maybe ~7–10%. The biggest killer is heat—hot cars or sun on the battery housing. So shade and airflow matter.

[PenelopeSM]

Maintenance routine for contacts: power off and unplug, then wipe all connectors with 90% or higher isopropyl alcohol and a soft cloth. Avoid water, don’t pry at pins, and don’t lubricate the contact surfaces. If you see corrosion, clean gently and let dry completely. For storage, it helps to disconnect from the bike to prevent parasitic drains.

[Hannah22]

Winter storage tip: remove the battery if possible and store at about 50–60% charge in a cool, dry place. Check the level every 1–3 months and top up to storage level. If your climate is very dry, a little humidity control helps. If you’ll ride again soon, you can leave it on a charger as needed, but don’t leave it on 100% for long periods.

[PaulC]

One quick question: what model battery are you using (brand, nominal voltage, capacity)? Some packs have different recommendations, and knowing the chemistry (NMC/LFP) matters for storage voltage and recommended charge window.