Detailed Answer
Battery life depends on type and usage frequency: NiMH batteries (AA/AAA) last 3–7 days per charge (8 h/day operation), rechargeable lithium batteries last 5–10 days, and alkaline batteries about 2–4 days. The LDER LD series supports both NiMH and lithium options, and XINGJIA comes standard with lithium batteries. Standby power consumption is extremely low (µA level), and batteries need replacement after 2–3 years of normal use. It is recommended to keep a spare battery to avoid interrupting work.
| NiMH | 3–7 days |
| Lithium | 5–10 days |
| Replacement cycle | 2–3 years |
Note:Replace promptly when the low-battery alarm (flashing indicator / buzzer) appears.