If you intend to ship or you are traveling by air with lithium cells, batteries or battery packs, you will need to know their Watt-hour rating. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable).
This is usually stated on the battery itself (see Image 1). If not, you can calculate it as Volts x amp hours (Ah).
- example 1: an 11.1 volt 4,400 mAh battery – first divide the mAh rating by 1,000 to get the Ah rating – 4,400/1,000 – 4.4ah. You can now calculate as – 4.4Ah x 11.1 volts = 48.8Wh
- example 2: a 12 volt 50 Ah battery – 50 Ah x 12 volts = 600Wh
If you need it our Lithium battery watt hour calculator will work out your results for you.