Portable Charger Circuit Board

hp1729

Joined Nov 23, 2015
2,304
I am making a small, portable charger that is going to use this 400mAh battery (http://4tronix.co.uk/store/index.php?rt=product/product&product_id=508). It is going to be an emergency charger. I cannot find a circuit board that will work to make a charger.

Does anyone know a circuit board that I could buy for this?
https://jet.com/product/detail/f23f9adf0e56471f920ab1fa6cad3eac?jcmp=pla:ggl:cwin_electronics_a3:electronics_accessories_power_power_adapters_chargers_a3_other:na:na:na:na:na:2&code=PLA15&k_clickid=fbc12582-e18a-4a6e-bb7b-159be68a10b6&abkId=403-556911&gclid=CJeQh-Kaw8sCFQlafgodY-cJbg

$7 for a 2,600 mAh portable charger.
 
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