to be the king of flashlights, but replacing those pesky D-cell batteries is kind of ridiculous in this day and age. So [Travis] decided to upgrade it to make use of the ever-so-common ...

If you do not want to purchase from the links below, please ensure the battery meets the above requirements. Amazon bans the sale of 18650 batteries, but you may still be able to find some there.

If you do not want to purchase from the links below, please ensure that the battery meets the above requirements. Amazon bans the sale of 18650 batteries, but you may still be able to find some there.

"Learn the entire process of creating a powerful DIY super capacitor spot welder for 18650 batteries. The guide covers ...

Hello, I have a related question in wanting to charge 2x 18650 batteries in parallel (3.7V, 5Ahr combined). I've looked at the suggested BQ25616 and note in the description it says "for single cell Li ...

To make it more convenient, I just copied the original topic here. In my application, I have to use 2x 18650 batteries in parallel for capacity reasons. At the same time, for marketing reasons, I need ...

If you are looking for an all in one kit then the Innokin Coolfire IV TC 18650 Kit is definitely worth looking into, I can’t really fault the performance of it at all! Dan was an early adopter of ...