Amp to Watt Hours for Lithium Batteries (Conversion Tables - OOS Handbook)
| Entry Date | October 21, 2025 |
|---|---|
| Issue Number | 25-091-HAZ |
| Name | Dustin |
| Agency | Henderson |
| Address | 1600 West Loop 306San Angelo, Texas, 76904United StatesMap It (opens in a new tab) |
| Phone | 4325534188 |
| [email protected] | |
| Committee | Hazardous Materials Committee |
| Status | Closed |
| Summary of Issue | With the increase of lithium battery transportation, there is not a conversion formula in the out of service criteria to change amp hours to Watt hours to determine if lithium batteries meet the exemption in 49 CFR 173.185(c)(1)(iv). |
| Justification or Need | Often times, inspectors conduct inspections in locations that do not have data service to where they can locate the formula to do the conversion to see what regulations apply to lithium batteries. |
| Request for Action | Adding the conversion formula of Watt hours = Amp hours × Voltage to the conversion page so inspectors can readily convert without having to access the internet to obtain the formula. . |