These warning signs and emergency actions come from FDNY’s battery-safety instructions (March 2024, printed page 45). Its current safety booklet also says to leave immediately if a battery expands or emits smoke, call 911, and not try to extinguish a battery fire. Do not delay leaving to collect photos or move the battery.
Check damage and safety notices before troubleshooting
If the pack, charger or cable is damaged, or you suspect water entered the battery, stop using or charging it and contact the manufacturer or qualified service provider. Do not charge a damaged pack to see whether it recovers. Aventon’s charger manual, for example, prohibits use or charging of an externally damaged or leaking battery and warns against charging one believed to have water inside.
Check current manufacturer and official safety notices against the exact battery label. The recall and warning tracker can help you find the original notice. As checked October 27, 2026, CPSC warning 26-118 tells owners to stop using Rad battery models RP-1304, RAD-S1304Y and HL-RP-S1304 and follow its disposal instructions. This is a model-specific product safety warning, not an all-Rad finding or an agreed replacement recall. An affected warning takes priority over a generic charging checklist.
Separate the three observations
Write down what each device is doing. “The battery is green” is incomplete if the light is actually on the charger.
| Observation | What to write down | What it does not establish |
|---|---|---|
| Battery indicator | Battery model; exact lights or bars; whether you used its normal charge-level button. | The condition of every cell or the bike’s power circuit. |
| Charger indicator | Charger model; steady or flashing pattern; whether it was connected to the battery when observed. | A universal full-charge or failed-battery diagnosis. |
| Bike display | Dark screen, normal screen, or exact error code; what happened during the normal power-on sequence. | Which component failed simply because the screen is dark. |
Why a red or green light needs the exact manual
| Exact source | What it says | Keep this boundary |
|---|---|---|
| Rad: External Standard Battery | Its charge-level section describes three green lights and one red light as fully charged. The key-ON instruction concerns reading that battery’s charge indicator. | These are lights on that battery, not a universal charger code. The article’s possible-fuse case directs owners to Rad support or a service partner. Do not apply this example to a battery covered by the stop-use warning. |
| Aventon: SFC-C01 fast-charger manual | Section 2.2 describes green for fully charged or standby, red for standard charging, a breathing light for fast charging and a red flash for abnormal operation. | Green alone does not distinguish full from standby. Use the warning and service instructions for the exact hardware; do not transfer these patterns to another charger. |
The Aventon manual also separately warns about red/green flashing during a charging error. Record the actual pattern rather than translating it into a guessed component failure.
Choose the symptom and the next step
What should I check if the bike will not turn on?
Record the display state, battery indication and any error. Use the exact manual’s normal power-on and battery-fitting instructions only if there is no damage or applicable stop-use notice. If these owner checks do not resolve it, contact service.
The Lectric XP4 US v1.3 manual has a specific “Bicycle will not turn ON” section on printed page 63. Its charging-time example belongs to that model and symptom; it is not an instruction to keep any faulty battery charging for a fixed number of hours. Follow the manual’s charging restrictions and stop for abnormal behaviour.
What should I check if the battery will not charge?
Identify the battery and charger, confirm manufacturer-approved compatibility, and read the exact charging and indicator instructions. A connector that fits is not proof of compatibility. Follow that equipment’s charging-temperature and connection procedure; do not borrow a “reset” from another system.
If the manual’s owner checks are complete and charging still does not work, record the light pattern and contact service. Do not open the pack, bend contacts with tools, bridge terminals or substitute an unverified charger.
What should I do if the bike cuts out while riding?
Stop safely and record whether the screen went dark, assistance stopped or a code appeared, plus the load and conditions. Arrange service for repeated shutdowns. Do not repeatedly push through them or bypass battery protections to continue riding.
How should I investigate lower-than-expected range?
Keep a record of comparable trips: assistance setting, distance, load and conditions. Ask the manufacturer about model-specific diagnostics and service options rather than treating one ride as a battery-health test. The battery planning tool works from explicit assumptions; it does not certify the health of your pack.
If the screen shows a code, use the appropriate Lectric or Aventon error-code guide to find the correct source and generation. A code label still needs its model context.
Prepare a useful service request
Keep these details for the manufacturer or service provider; there is no need to post serial numbers or purchase documents publicly.
| Field | Useful record |
|---|---|
| Equipment | Exact bike, battery and charger models; manual version or link. |
| Symptom and timing | When it started; during charging, power-on or riding; exact display/error text. |
| Separate indicators | Battery, charger and display observations from the worksheet above. |
| Recent changes | Impacts, water exposure, storage, accessories or replaced equipment. |
| Checks already done | Which exact manufacturer-approved owner checks you followed and the result. |
| Service records | Purchase/warranty details and exterior photos only if safe to obtain. |
Charging, replacement and disposal
CPSC’s micromobility guidance says to follow manufacturer charging instructions, remain present, and avoid charging while sleeping or away. Use the supplied or manufacturer-recommended charger and a replacement battery confirmed suitable by the device manufacturer. Do not use packs modified by unqualified people or made with repurposed or used cells.
Ask the manufacturer or qualified service provider about approved repair or replacement. Do not put lithium batteries in household trash or general recycling. For a recalled or warned-about product, follow the specific notice. Contact the collection facility before taking a hazardous battery there and ask whether it accepts that battery; follow its acceptance and transport instructions.
Continue with the battery replacement-cost guide, temperature and storage checklist, or everyday charging guide. For travel, use the battery transport checker and airline guide. The winter riding guide covers the journey in cold weather.
Frequently asked questions
Why will my e-bike not turn on when the battery looks full?
A charge indication and a working bike are different observations. Record the exact indicator and display state, then follow the correct model’s owner checks or contact service.
Does a green charger light always mean a full battery?
No universal colour rule applies. Aventon’s linked SFC-C01 manual describes green for either a full battery or standby; use the exact charger’s instructions.
Should I reset a battery that will not charge?
Use only a procedure explicitly intended for the owner in the exact current manual. Do not open the pack, bypass protection or apply a generic terminal-short or jump-start recipe.