Battery health vs warranty

Popular_Register_440 | 2026-03-13 16:10 | 18 views

Hi guys, I’m in the market for a Model 3 LFP. I’m aware the standard RWD Auto warranty (basic) runs out at 50k miles or 4 years and battery warranty is 8 years or 100k miles. I’m looking at 2 pieces atm: Ones at 90k miles for £13,349 with 93% battery health. The other is at 45k miles at £16,100 (15,600 with £500 finance agreement deposit) but it’s BigMotoringWorld who don’t do battery health certification and only the in-screen Tesla battery health test. Is battery health more important than battery warranty? Would you save the extra couple £k, favour the guaranteed decent battery health instead? Apologies for the perhaps basic question but I’m new to both the EV world and Teslas in general.

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JtheNinja 2026-03-13 19:26

That LFP pack has a reputation of being kind of unkillable. As long as it's not actively throwing fault codes, I wouldn't worry too much about it. LFPs also aren't as susceptible to abuse as traditional lithium batteries, they mostly just calendar age. Meaning all cars of a particular age are going to be similar in battery health, regardless of miles or how they were treated. I'd get the one with half the miles for £3k extra, but not for any battery related reasons. That's just not a lot extra to pay for half the wear on the suspension/interior/etc

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