Batteries, chargers, sleeves, and cases.
Protect your batteries at all times by carrying them in either a silicone sleeve, or a plastic battery case. Never carry batteries in your pocket, without them being in some sort of case. Li-ion batteries react violently to short circuiting, and can cause damage and/or injury due to neglect or carelessness.
Charging your batteries in a separate charger not only prolongs the lifespan of your batteries, but also saves needless wear and tear on the MicroUSB port on your devices (if applicable). Some multiple battery devices, while having a MicroUSB port, do not charge or properly charge (balance charge) batteries. The MicroUSB port in this scenario, is used for firmware updates for the chipset inside your device.
Always choose the correct battery for the application. High mAh does not necessarily mean high amperage output. In fact, it means the opposite. 20A-30A batteries never exceed 3000mAh. If your batteries have a mAh rating higher than this, the Amperage output of your batteries will be a lot lower, generally within the 10A or less range. This can be dangerous if the battery is being used for low resistance, high Wattage vaping, such as on a mechanical or unregulated device.
Should you have any questions about battery safety or require information about batteries in general, please don't hesitate to contact us!