Data Sheet

USBLIPO USB LiPo Charger Quickstart Guide
The USB LiPo Charger provides a convenient way to charge 3.7V Li-Poly cells (or parallel
matched sets of cells at 3.7V) from a 5V USB source such as a computer or a mobile phone
charger.
Setting The Current Limit
The USB LiPo Charger uses an onboard charge management chip that monitors the state of the
battery and adjusts the charge current accordingly. If the battery needs significant charging it will
supply current up to the maximum rate set by the current limit jumpers on the bottom of the
PCB. Both jumpers are open by default, setting the current limit to 100mA.
Check the specifications for your battery to determine the maximum charge current. If you
battery can sustain higher charge rates you can place solder bridges across one or both current
limit jumpers to change the settings as follows.
SJ1
SJ2
Charge Rate
Open
Open
100mA
Open
Closed
200mA
Closed
Open
300mA
Closed
Closed
500mA
Fitting The Battery Connection
Because different batteries use different connections, the USB LiPo Charger does not come with
a battery connector but does include two pairs of pads for you to fit the specific connector to suit
your battery.
The smaller, inner pads suit typical 2mm JST connectors used on many batteries, while the outer,
0.1" pads suit larger connectors, headers, flying leads, or even small screw terminals.
Pay very careful attention to the polarity of the connections. The PCB has "+" and "-" marked on
both the top and bottom of the PCB. Fit the connector for your battery on either the top or the
bottom of the PCB, depending on how it should be polarised.