In summary the best way to prevent your battery deteriorating is to,
1. Always switch off when not in use.
2. Make sure to store in a cool place, as this will prevent the battery from overheating.
3. Keep out of hot areas at all times.
4. Try to store your device with around 35-40% of battery.
The AWT C2 Charger is a good charger for your batteries. Once inserting, AWT C2 Charger detects your battery automatically. It supports 2A quick charging. The chargers supports the following batteries: 10440, 10670, 16340, 14500, 18350, 18490, 18500, 18650, 26650, etc. The charger comes with two charging slots.
This lithium-ion battery uses similar internal chemistry to the batteries used to run electric cars and rechargeable power tools. The battery has an excellent safety rating and offers the ideal performance characteristics needed to power modern, sub-Ohm vaping mods.