No. The voltage of 18500 and AA batteries is different. The voltage of 18500 lithium batteries is 3.7V, while the voltage of AA batteries is 1.5V. The two batteries have different voltages, so they cannot be used universally. The battery has a specified maximum voltage and current. If the maximum voltage or current is exceeded, the charger will be damaged.
Will the 18500 lithium battery expand after use?
The dimensions of 18490 and 18500 lithium batteries are definitely different.
If the materials and processes are the same, the battery characteristics will be the same but the capacity will be different.
“18” refers to the battery diameter of 18mm. “500” and “490” refer to the battery length of 50mm and 49mm respectively. The appearance of the two batteries above is not much different. , and the specific capacity corresponds to different brands et manufacturers. There will be slight differences.
The 18500 lithium battery will expand after use.
Lithium battery expansion is commonly referred to as “bulge.”
There are two reasons. The first is the problem of battery manufacturing level, uneven electrode coating and production. the manufacturing is relatively crude. To put it simply, the quality of the lithium battery itself is not good enough; the second problem is overcharging and overdischarging during use. These two factors will cause a violent short circuit-like reaction inside the battery during use, generating a large amount of heat, which in turn will cause the electrolyte to decompose and vaporize, causing a swelling of the battery.
Based on the situation you described, it should be an overload problem.
If the battery is bulged, please stop using it. Continuing to use an inflated battery will significantly increase the risk of explosion.