Datasheet
Proper Charging
Now that you know how best to use your lithium ion/polymer battery, we'll finish up by making sure you know how to
charge the battery. We'll have a longer tutorial for our chargers at some point but we want to get people started with
how to best use our chargers!
As we mentioned before, you must use a proper lithium ion/polymer battery charger. The good news is that nearly all
batteries you will encounter are going to be 4.2V. And you can use a 4.2V charger for both lithium ion and lithium ion
polymer. If you ever encounter a 4.35V battery, you can always use a 4.2V charger: it'll charge it up to 4.2V which is
perfectly safe.
We carry two chargers in our store (at this time). A USB charger and a USB/DC charger. The USB charger is meant for
charging single cells from a USB port that can provide 500mA or so. The USB/DC charger is meant for charging
batteries from a USB port or a DC power supply up to 12V. The latter is more flexible, but more expensive because of
the added circuitry.
You'll note that both have battery ports on the bottom (Labeled Battery In and Out) and charging ports at the top (USB
on the left and USB + DC on the right)
To connect the battery, simply plug it into the BATTERY IN slot.
© Adafruit Industries https://learn.adafruit.com/li-ion-and-lipoly-batteries Page 15 of 20










