Advantages:

Comes with complete protection(overcharge, overdischarge, overcurrent, short circuit), without relying on tools or chargers

With active equalization(extend battery life, slow capacity decay)

Diy friendly, adapters, inverters, and other equipment are all safe

  Affordable and easy to repair.

Better suited for third-party tools than the original, such as outdoor lights, electric fans, inverters, car jump starters, etc. won't over-discharge.

  Precautions:

1. (diy): this product is a component without battery cells and is used to repair and assemble battery packs. it is only suitable for people who are familiar with battery performance and have practical experience in battery assembly.

2.  this product does not provide after-sales service,it is just a set of components without batteries. you need to assemble a battery pack with your own 3x 18650 power lithium batteries. we cannot guarantee that you can successfully assemble the battery pack. please purchase with caution! if you have any objection, please do not place an order.

Assemble
Preparation before:
(1). if using a new core, please note:

A. must choose 18650 power lithium battery cell.


(2). if the old batteries are refurbished, please test the voltage at both ends of each battery. if the voltages differ, charge each battery to the same voltage level.

Very important :

Make sure the voltage of each battery is the same before welding pcb.

Our store's protection board pcb is available in two board colors, blue/color random delivery. the circuits, components, and performance parameters of the two models are exactly the same. only the base board color is different, which does not affect the use effect. please feel free to place an order~