Normally, a reliable energy storage battery, if properly maintained, can last 8-15 years. Experimental data from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, shows that lithium iron phosphate batteries can achieve a cycle life of 6,000 to 10,000 cycles. If charged and discharged once a day, theoretically, it could last 16 to 27 years. Of course, this is not achievable in real-world use; these are ideal laboratory figures.
Charging and Discharging Habits
Many people think that it's fine to completely drain a battery before recharging it, or fully charge it before using it again. However, lithium batteries don't tolerate this. Overcharging and over-discharging are both fatal to lithium batteries. Dragging it to zero is abusing it. Just like eating, being overfed or starving at every meal is bad for your health.
Temperature Environment
The optimal operating temperature for batteries is 15℃-30℃. Outside of this range, whether exposed to direct sunlight on a balcony in summer or working in a yard at sub-zero temperatures in winter, a shortened lifespan is inevitable. Experts from the Institute of Metal Research, Chinese Academy of Sciences, pointed out that high temperatures accelerate the aging of chemical substances inside batteries, while charging at low temperatures can cause the formation of a "lithium plating layer" inside the battery, resulting in irreversible damage to the battery structure.
Avoid Mixing and Using Different Batteries
If you have multiple batteries at home, try not to mix them. An old battery can drag down the performance of the entire system to its level. It's best to use batteries from the same batch and brand. Furthermore, if you plan to not use the battery for a long time, do not fully charge it or store it completely empty. It's best to charge it to about 50% and store it in a cool, dry place, recharging it every few months.