How should chargers be stored in an unheated warehouse in winter?

Main answer · Wecent Editorial Team

Short answer: Check the storage temperature range on the product or from the factory, keep cartons off the floor and away from walls, keep power banks and other battery products within their limits, and let cold stock warm up slowly in its packaging before opening to avoid condensation. Check humidity and inspect samples from time to time.

The main risks

Cold itself is rarely a problem for plain chargers, but there are other issues: condensation when cold items are brought into a warm room, humidity, brittle plastics and cold-sensitive batteries.

Know the limits

Find the storage temperature range for each product, and for batteries separately. Many products list a range, and lithium batteries have their own limits. Ask the factory if the information is not clear.

Practical rules

1. Keep cartons off the floor, on pallets or racks, away from cold walls and doors.
2. Control moisture. Keep the roof sound, avoid leaks and use desiccant if humidity is high.
3. Protect against condensation. When cold stock comes in, leave it sealed in its packaging for several hours, or a day for large lots, until it reaches room temperature before opening.
4. Handle plastics carefully. Cold plastics are more brittle, so avoid rough handling and drops.
5. Protect power banks and other batteries. Keep them within their listed range, and follow the safety and transport rules for lithium batteries. Do not charge a battery that is below its allowed charging temperature.
6. Keep packaging in good shape. Carton labels and print can crack if cold.
7. Check for freezing and thawing cycles, which cause moisture problems.
8. Rotate stock so older goods leave first.

Inspections

Take samples from stock regularly. Check packaging, labels, appearance, and function after warming up. Record results.

Before shipping

Let the stock reach room temperature before testing or shipping if possible, and check the cartons for damp.

Transport

Remember that delivery trucks may also be cold or hot. Plan for it.

Record keeping

Record the lowest and highest temperatures with a data logger, so you can see if limits were passed.

Quick summary

Know the limits, keep stock dry and off the floor, and warm it slowly before opening.

Example winter routine

Receive the pallet and leave it wrapped in a sheltered area for a day. Open one carton and check for damp. Move the pallet to a rack off the floor. Check the temperature log each week, and inspect one carton per pallet each month. Write the results on the pallet record so the next person sees them.

Where this answer says to confirm with Wecent, the detail is not published on the product page and has to come from the datasheet or the factory. General facts come from the regulators, standards bodies or device makers named in the text.