Ordering specifics
- Match the battery to the 5 Plus generation; earlier RadCity external packs are a different design and do not fit the semi-integrated frame
- Rad's serial-number lookup or support chat confirms the right part before you pay
- Service centers and mobile service (in covered cities) can supply and fit it if you want zero involvement
Clone warning, Rad edition
Rad's popularity means marketplace clones exist for their packs specifically. Beyond fire-safety concerns, clones have bricked themselves after firmware-adjacent BMS mismatches; the bike may run, then refuse charging. The OEM premium is the entire product here.
Getting the most from it
Rad packs respond to the universal rules: room-temperature charging, partial charge for storage, no month-long stints at empty. The 5 Plus's pack slides off for indoor charging, so winter care is easy.
The first week with a new pack
Inspect the housing before it ever meets the bike; refuse dents or rattles from shipping. Look into the frame tray, and clean the contacts gently if anything green or gritty accumulated where the old pack sat. Seat the new pack until the lock engages positively, and do the first charge indoors and attended, following the sheet Rad includes; if it asks for a full initial charge to settle the gauge, that instruction outranks the usual partial-charge habit. Then ride normally: the first few cycles tell you quickly whether range matches expectations or the order needs a support ticket.
Buy the next one before you need it?
Worth considering. Pack availability tracks a model's commercial life, and owners intending to ride a 5 Plus for many years sometimes order a spare while stock and revision questions are simple, then rotate both packs, which slows aging on each. The budget version of the same idea: treat gradual range fade as your early warning and open the conversation with Rad while the bike still gets you home. Waiting until the pack is fully dead means commuting on hold while sourcing happens, which is the expensive kind of cheap.
Retiring the old pack safely
A lithium pack never goes in household trash or curbside recycling; crushed cells start fires in trucks and facilities. Tape over the contacts, keep it somewhere cool and dry, and take it to a battery drop-off point or a bike shop that accepts e-bike packs; call ahead, because acceptance varies. If the pack is swollen, hot, or was damaged in a crash, say so when you call: damaged lithium gets special handling. A half-dead pack that still charges can also serve as a short-trip spare while you decide.