1. Alkaline battery is the most commonly used battery. Its power is higher than that of lead battery. It can't be charged. It only has 10%~20% power when it is at low temperature 0F. The Voltage voltage will be significantly reduced when used.
2. Nickel-cadmium batteries: can be charged thousands of times, it can maintain a certain power, it can not be compared with the energy stored in alkaline batteries, at low temperature 0F still 70% of the power, rock climbing process is best to carry high The energy battery is 2 to 3 times higher than the standard battery.
3. Lithium battery: It is 2 times higher than the normal battery power voltage. Two lithium batteries with an ampere value/time more than 2 times of the lithium battery are used at 0F as room temperature, but they are expensive, and its voltage can be held. Constant, especially practical at high altitudes.