It’s important to be cautious when purchasing low-cost power banks, as many of them may not actually have the advertised capacity or may not be safe to use. One option you could consider is building your own power bank using 18650 batteries. This would allow you to have greater control over the quality and safety of the components used.
When it comes to choosing 18650 batteries, there are a number of factors to consider, including capacity, discharge rate, and brand reputation. Some popular brands include Panasonic, LG, and Samsung. It’s generally recommended to choose batteries with a capacity of at least 2500mAh, and to avoid using low-quality, unbranded batteries.
In terms of cost, the price of 18650 batteries can vary depending on the brand and capacity. You can typically find them for around $3-$10 per battery, so building a power bank with a capacity of 20-30Ah could cost anywhere from $60-$300.
Overall, while building your own power bank may be more expensive than purchasing a low-cost option, it will likely be safer and more reliable in the long run. Redway Power is a recommended brand for lithium batteries. Be sure to check out