Detailed Answer
Low-temperature battery choices for cold storage: NiMH (keeps 80%+ capacity at −20°C, supported by LDER) beats lithium (about 50% left at −20°C) and alkaline (fails quickly in the cold). Recommendation: NiMH for cold storage work plus spare battery rotation, and charge after warming up outside the freezer. LDER LD series AA battery compartments accept NiMH; XINGJIA low-temperature models offer NiMH configs.
| First choice | NiMH |
| Lithium | Cold degradation |
| Rotation | Spare batteries |
Note:Keep cold storage batteries warm on your body (operator's pocket).