Charge cycles are counted 0-100% charges. The 80/20 rule kinda faked the funk a bit and buys you fractions. I’m sure somebody will jump on that simplistic example with a bunch of technical battery stuff but bottom line is the BMS will maintain the battery at optimal charge levels and keep the cycle count extended. Yarbo’s stated cycle count is low for the type of battery, honestly I think they are just being conservative. I think it could probably do more. And even when you hit the cycle count, it can stay at 80% for a really long time before further degrading.
There is currently no way for the user to check in app the state of charge, cycle count, battery health, cell voltages, etc. this would be fantastic if we could. However, if you’re concerned, support should be able to check this for you. I’d submit a ticket and see what they say.
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LFP batteries don’t tolerate cold well and are not optimal for winter use cases. The Y model uses a version of NMC which has better output performance at cold temperatures, it still shouldn’t be charged below freezing, hence the heater, but also has much worse cycle longevity, ~1/5-1/12 the number of charge cycles as LFP depending on conditions. 20-80% charge is the optimal range to stay in to reduce degradation. The worst thing you can do, for either type, is leave the battery at low SOC in hot weather for a long time. Leaving at 100% charge isn’t really all that good either. Always try to recharge to 50%-60% at minimum. Cold weather storage isn’t a huge deal just don’t charge below freezing, most BMSs won’t allow it. It sounds like your battery is at it’s “standard” EOL, it’s not unusable or necessarily unsafe to use, as long as the BMS has proper monitoring, but there could be dendrites forming, and the cathode and anode get a coating that reduces performance.
It’s best to send it off for recycling, luckily lithium batteries have very high recovery/recyclability properties. Maybe Yarbo could cover that first exchange under warranty or pro-rate it for you. $1100 is definitely way too expensive for their battery but they probably have limited stock and don’t really want people buying them separately for now unless they’re really willing to pay
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