Why 3.8V Is the Number That Slows LiPo Ageing in Storage
Quick Answer
Set a standard LiPo to about 3.80V per cell before storing it: 7.60V for 2S, 11.40V for 3S, 15.20V for 4S or 22.80V for 6S. Disconnect it from the model, inspect it, protect the terminals and keep it in a non-conductive fire-resistant container in a cool, dry place away from combustible material.
The 3.8V Storage Rule
A LiPo ages faster when it sits fully charged, while an already low pack can self-discharge into an unsafe condition. Manufacturer guidance from Horizon Hobby places a standard LiPo at approximately half charge at 3.80V per cell. Some charger storage programmes use 3.85V; either is a sensible target when it matches the battery and charger instructions.
Our rule is simple: if a pack will not be used within the next day or two, run the charger's storage programme rather than leaving it at 4.20V per cell. The SkyRC D200neo has a dedicated storage function, so there is no need to calculate a discharge time or stop the process manually.
LiPo Storage Voltage Table
| Pack | Target per cell | Target pack voltage |
|---|---|---|
| 1S | 3.80V | 3.80V |
| 2S | 3.80V | 7.60V |
| 3S | 3.80V | 11.40V |
| 4S | 3.80V | 15.20V |
| 5S | 3.80V | 19.00V |
| 6S | 3.80V | 22.80V |
These totals are cell count multiplied by 3.80V. Do not use this table to identify an unknown pack, and do not confuse standard LiPo with LiHV: select the battery chemistry stated on the label and use its charger profile.
How to Put a LiPo Into Storage
- Let a warm pack return to room temperature, then inspect the wrap, leads, connector and balance plug.
- Connect both the main lead and balance lead to a compatible charger.
- Select the correct chemistry and cell count, then choose Storage. Confirm the detected cell count before starting.
- When complete, check the individual cells, disconnect the pack and cover exposed connectors so they cannot short.
- Store it away from heat, direct sunlight, moisture, fuels, paper and escape routes.
For home storage, we prefer a cool indoor location over a fridge. Refrigeration adds condensation and handling problems without being necessary for ordinary RC packs. A TheFPV LiPo Safety Bag or ToolkitRC LiPo Safety Bag provides secondary containment, but no soft bag makes poor placement safe.
Checks Before Storage and Reuse
Do not store a swollen, punctured, leaking, hot or crash-damaged pack with healthy batteries. Isolate it outdoors in a safe location and follow local battery-disposal guidance; do not try a charger's recovery mode. For sound packs, recheck voltage after long storage and inspect them again before charging.
There is no benefit in repeatedly cycling a healthy LiPo simply because it is stored. Leave it near storage voltage and check it periodically. Horizon Hobby advises checking packs that have been out of service for more than six months and not charging one if any cell is below the manufacturer's safe starting voltage. Our LiPo safety guide covers charging and C-ratings, while our LiPo explainer covers the chemistry.
FAQ
What voltage should I store a LiPo battery at?
Use approximately 3.80V per cell for a standard LiPo. That is 7.60V for 2S, 11.40V for 3S, 15.20V for 4S and 22.80V for 6S.
How long can a LiPo battery stay in storage?
A sound pack can remain stored for months when set to the correct voltage and kept in suitable conditions. Inspect it periodically and check cell voltage before charging after a long break.
Can I store a LiPo fully charged?
Not for longer than necessary. A full standard LiPo sits near 4.20V per cell, which accelerates ageing. Use storage mode if your flying plans change.