Safely storing and transporting LiPo batteries

LiPo batteries are the power source for almost every modern RC car, drone, or boat. They’re lightweight and deliver a lot of power, but they’re also more sensitive than older NiMH batteries. Most problems don’t happen while driving, but when the batteries are left unused or transported. Follow the tips below to make your batteries last longer and keep everything safe.

Also read our article on how to charge a LiPo battery correctly.

1. Store your LiPos at storage voltage

This is the most important rule. A LiPo cell is fully charged at 4.20 V and empty at around 3.0 – 3.2 V. If you’re storing a battery for more than a few days, bring it to the storage voltage of around 3.80 – 3.85 V per cell.

• Storing fully charged causes cells to age faster and can make them swell.
• Storing empty is even more dangerous: self-discharge can cause the voltage to drop below the critical level, after which the battery can no longer be charged safely.

Almost every modern LiPo charger has a Storage function that automatically brings the battery to the correct voltage by charging or discharging it. Want to quickly check the voltage of each cell? Handy LiPo testers are available for that.

2. Choose the right place

• Store LiPos at room temperature, ideally between 15 and 25 °C.
• Choose a dry place, out of direct sunlight and away from flammable materials.
• Never leave batteries in a hot car in summer.
• Store them in a LiPo bag or a fire-resistant box, on a non-flammable surface such as a stone floor or metal cabinet.

3. Transport your batteries safely

On your way to the track or the woods, a battery can be damaged by impacts or a short circuit. So keep the following in mind:

• Transport batteries at storage voltage, not fully charged, if you’re not going to use them right away.
• Put them in a LiPo bag or sturdy case so they don’t slide around loose.
• Protect the connectors so the terminals can’t touch each other or metal objects.
• Never take batteries in a very hot car, and don’t put them in the trunk next to tools.

Flying with your LiPos? Airlines have strict rules, such as a maximum capacity in Wh and requiring batteries to be carried in hand luggage only. Always check with your airline in advance.

4. LiPos in winter

You may drive less in winter. Bring any batteries you won’t be using for a while to storage voltage and check them about once a month. Still driving in the cold?

• Never charge a LiPo below 0 °C. Let it warm up to room temperature first.
• Keep your batteries warm in your jacket pocket or an insulated bag until just before driving.
• A cold LiPo delivers less power and can drop below its minimum voltage sooner. Drive a little more carefully and stop in time.

5. What should you do with a swollen or damaged LiPo?

A LiPo that swells (“puffs”), has a torn casing, or gets very hot while charging must no longer be used.

1. Stop charging or using it immediately.
2. Place the battery outdoors or in a LiPo bag in a safe, non-flammable location.
3. Never puncture the battery or try to flatten it.
4. Discharge it, for example using your charger’s discharge function, and take it to a Bebat collection point. You can find these at most supermarkets, recycling centers, and electronics stores in Belgium.

Quick checklist

• After driving: let the battery cool down and bring it to storage voltage.
• Store at room temperature, in a LiPo bag, on a safe surface.
• Check regularly for swelling or damage.
• Never charge unattended or below 0 °C.

Conclusion

With a few simple habits, your LiPos can last for years and you can avoid risks. The most important thing: always store them at storage voltage and in a safe place. Looking for new batteries or safe storage? Check out our LiPo batteries and LiPo bags.