How long mobility scooter batteries last
Most UK mobility scooters use sealed lead-acid (SLA/AGM) batteries, which typically last around 18 months to 3 years with regular use and correct charging. Lithium batteries, found on many lightweight folding scooters, last longer — often 4 to 6 years — and hold charge better in storage. Batteries degrade with charge cycles and with age, so even a lightly used scooter that is five years old will usually need new batteries before resale.
Signs your batteries are on the way out
Watch for a noticeably shorter range than when new, a gauge that drops from full to low quickly then partly recovers when you stop, sluggish performance on inclines, or a charger that reports full after only an hour or two. Swollen battery cases, corrosion around the terminals, or a sulphur smell mean the batteries should be replaced and the scooter should not be charged unattended.
What dealers pay for a scooter with tired batteries
Dealers replace batteries as a matter of course before resale, so a scooter with old batteries is not unsellable — the cost is simply deducted from the offer. As a rough guide, a pair of replacement SLA batteries plus fitting is a trade cost of roughly £120–£250 depending on amp-hour rating, and lithium packs cost significantly more. Being honest about battery age often results in a firmer, more reliable offer than optimism that is corrected on collection day.
Simple charging habits that protect value
Charge after every use rather than waiting for the battery to run flat, and leave the scooter on charge for 8–12 hours for lead-acid packs. If the scooter is not being used, charge it at least once a month — lead-acid batteries sulphate and permanently lose capacity when left discharged. Store the scooter somewhere dry and above freezing, and use the manufacturer's charger; generic chargers can undercharge or overcharge and shorten pack life.
What to tell dealers when you list
Include the battery age if you know it, whether they are the original batteries or have been replaced, roughly what range you get on a full charge, and whether the charger is included. A missing charger reduces offers slightly, so it is worth checking the shed before you list.