Some 18650 lithium batteries on the market have false standards. It is difficult to confirm whether 3400 mAh actually has such a high capacity. Here are the weight values of some physical 18650 batteries for your reference: Disassembled battery, marked 1300mah, no protection plate, flat head.
The battery removed from the x-live mobile power supply has no protective plate and a flat head.
Domestic divine fire, pointed tip, with protective plate, marked 3500mah, the actual value is about 1300mah.
The original is good.
Generally speaking, the quality of Japanese products such as Sony and Panasonic is better. However, domestic products such as Lishen are also good, but the price is generally relatively high. There are now many large manufacturers. are generally OK.
The production technology of 18650 ternary lithium battery is basically rrelatively mature.