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Adafruit Micro USB Charger for JST Li-Ion/Li-Poly batteries with breakout

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Quoting product code: A80RK


About this product


Product overview

• Suitable for lithium-polymer and lithium-ion 3.7V and 4.2V batteries
• Status LEDs tell you whether the battery is fully charged
• You can mount this charger in a case and recharge your project easily – making this great for portable projects
• Charge your batteries with this adapter using any Micro USB cable

Getting started and utilising the pinouts
Simply connect a micro-USB cable into this charging adapter and connect your 2-pin JST battery. This device will do the rest for you.

This USB battery charger also comes with pinouts, which can power your projects directly from USB or battery pinouts. Caution is advised if you’re looking to connect both to your circuit.

What batteries can I use with this charger?
This charger is only to be used with lithium-polymer or lithium-ion batteries that are 3.7V or 4.2V only. Batteries are connected via the 2-pin JST connection, for which a cable is provided. Two LEDs help you determine whether the battery is currently charging (red), and when the battery is fully charged (green).

Takes care of your batteries
This charger works in three stages. It firstly performs an initial preconditioning charge which will help prevent improper charging of depleted batteries. After preconditioning, the charger offers a constant-current fast charge to reach full charge as quickly as possible. When the battery is full, this charger will supply a trickle charge to keep it safely topped up.

If you are looking to store your batteries for a period of time, it is advised to store them with a charge of 50 per cent. This will help ensure the maximum overall life of your battery.


V-In Connector USB-Micro
V-Out Connector 2-Pin JST
Battery Chemical Support Lithium-ion
Battery Voltage Support 3.7V
Package Contents USB battery charger
2-Pin JST cable

My application has several 3.7v 18650 cells in serial and/or parallel. Will this be able to charge the whole project? (Obviously. I don't want to have to charge each cell individually :-)).

Asked by: orchar800
As much as we would love to be able to help here, we cannot offer design project advice or assistance, we are more than happy to locate products and support you with your purchases but we are not able to design entire circuits or projects for you. If you do have the design/circuit information detailing the value of the components needed we will be happy to locate these for you.
Answered by: James
Date published: 2016-10-27

Do you stock a suitable JST plug to fit this? What is the part number please?

Asked by: Jeff
On this occasion Maplin do not stock a product that exactly meets your requirements, or indeed anything close enough to offer you as an alternative.
Answered by: Dominic
Date published: 2017-01-27

Could this charge a portable speaker?

Asked by: Craig
This charger is only to be used with lithium-polymer or lithium-ion batteries that are 3.7V or 4.2V only. which are connected via the 2-pin JST connection. It is not designed to charge any completed devices, just the batteries specified.
Answered by: Gareth
Date published: 2016-04-21

Will this be able to charge a phone? thanks

Asked by: toms
Unfortunately this would not be suitable for your intended application.
Answered by: Billy
Date published: 2016-04-12

What is the size of the 2-pin JST cable connector?

Asked by: lentilhater
Full details can be found in the link below https://www.adafruit.com/product/1904
Answered by: Dominic
Date published: 2016-03-09
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