An e-bike battery can arrive at the counter looking tidy, labelled and apparently "compatible" while the real evidence trail is still missing.
That matters more now because the UK regulator is still tightening this part of the market. In the OPSS Delivery Report 2025-2026, published on 5 August 2026, the Office for Product Safety and Standards said a new Publicly Available Specification for lithium-ion battery systems and new guidance on product safety requirements for e-bike conversion kits are both expected later this year.
For repair shops, that is the signal to get stricter before a customer-supplied battery is fitted, charged, paired with a charger, or moved into shop-owned resale stock.
What the current UK guidance already says
The current OPSS statutory guidelines on lithium-ion battery safety for e-bikes, published on 12 December 2024, say lithium-ion batteries for e-bikes and e-bike conversion kits fall under the General Product Safety Regulations in Great Britain.
The same guidance says a safe battery should include safety mechanisms capable of preventing thermal runaway during charging and discharging, and that the battery protection system should also be capable of preventing thermal runaway caused by an incompatible charger.
That gives repair shops a practical rule: if the customer cannot show what the battery is, what charger belongs with it, and why the combination is considered compatible, the job is not ready for routine fitting.
Why this is not only a workshop issue
The Department for Transport's battery safety for e-cycle users guidance, published on 1 February 2024, says it is safest to buy a complete e-cycle with battery pack and charger included from a reputable retailer, warns that used battery packs can already be damaged or abused, and advises buyers to use only genuine replacement batteries and chargers authorised by the manufacturer.
That advice is customer-facing, but it applies just as strongly to repair counters and used-bike resale teams.
If a shop fits a battery with a weak paperwork trail, the risk does not end at the bench. It follows the bike into charging, storage, collection, test rides and resale.
The evidence check to run before fitting or resale
Before staff accept a customer-supplied battery as fit for service, record:
- battery make, model, serial number and visible product markings
- charger make, model, output details and connector type
- supplier, retailer or marketplace source, with invoice or order evidence where available
- the exact bike, motor system or conversion kit the battery is claimed to fit
- any manufacturer approval, compatibility page or written confirmation the customer can provide
- casing condition, connector condition, water-ingress signs, swelling, impact marks or non-standard wiring
- whether the battery is original equipment, aftermarket, rebuilt, repaired or second-hand
- whether the job requires first charging, long charging, overnight hold, transport or resale preparation
If the evidence is incomplete, log that gap clearly. "Customer says it fits" is not a compatibility record.
When the shop should pause the job
Move the battery into a hold workflow if:
- the charger cannot be matched confidently to the battery
- the battery is second-hand, rebuilt or of unclear origin
- there is no credible source record or compatibility proof
- the casing, mount or wiring shows damage, modification or improvised repair
- the battery is intended for a conversion-kit bike but the component mix is unclear
- the shop would need to charge the battery before basic provenance and condition checks are complete
This is also where current OPSS distributor guidance matters. The statutory guidelines say distributors must not supply products they know or ought to know are dangerous, and must not continue supplying products that are subject to a recall or known safety concern.
For a repair shop that buys and sells used e-bikes, that means provenance, compatibility and recall checks should sit in the same workflow, not in separate notebooks.
Customer wording that is easy to defend
Use wording like this:
"Before we fit, charge or resell a customer-supplied e-bike battery, we need to confirm the battery identity, charger match and compatibility evidence. Recent UK guidance is clear that incompatible or poorly evidenced battery setups can create a fire risk, so we pause jobs where the paperwork or component history is unclear."
That script is more useful than a vague "health and safety policy" line because it explains exactly what the shop is checking.
Where this fits in Manage Repairs
Shops using Bike Repair Software can store battery serials, charger photos, supplier evidence, hold reasons and customer approvals in one job record before the battery reaches a charging point. The Manage Repairs blog is the right place to publish a customer-facing version of your battery policy so staff can send one consistent explanation. The pricing page helps explain why compatibility review, safety triage or resale prep may sit outside a basic labour quote. If the bike or battery may move into used stock, the repair shop inventory management software guide and bike repair shop software page are the natural follow-on links.
The shop takeaway
Treat a customer-supplied e-bike battery like a product-evidence job, not only a fitting job.
If your team standardises the identity, charger, compatibility and condition checks before fitting or resale, you reduce fire-risk exposure and make battery refusals much easier to explain.