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This is a Lithium Ion and Lithium Polymer battery charger based on the MCP73833 (Datasheet). It uses a USB mini-B for connection to any computer or 'USB wall adapter'. Charging is performed in three stages: first a preconditioning charge, then a constant-current fast charge and finally a constant-voltage trickle charge to keep the battery topped-up. The fast-charge current is 200mA by default, but is easily adjustable from 100mA up to 1000mA by soldering a through-hole resistor on-board.

This board is great for DIY projects because it has 3 indicator LEDs - one for power, one for charging status and a third that indicates when charging is complete. Keep the battery connected to the charger and pass power through the additional JST connector using the included cable!

Comes assembled and tested with a free bonus JST cable!
5V input via mini-B USB connector
For charging single Lithium Ion/Lithium Polymer 3.7/4.2v batteries (not for older 3.6/4.1v cells)
200mA charge current, adjustable up to 1000mA by soldering in a resistor
Separate JST connectors for battery and load system so batteries don't have to be removed for charging
Chip supports a 10K thermistor which we have stuffed as a plain 10K. For people who require temperature monitors (using high charge rates), remove the 10K and solder in the thermistor in its place
0.1" (2.54mm) pads next to the JST in case you want to use terminal blocks or connect it to a breadboard
Free 2-pin JST cable included!



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Charge your single-cell lithium ion/polymer battery any which way you like with this board. Have a USB connection? No problem, just plug into the miniUSB connector. Only have a wall adapter? Any standard 2.1mm DC adapter which puts out 5 to 12VDC will work fine. If both are plugged in, the charger will automatically choose whichever has the highest voltage.

Other nice things about this charger include multiple LEDs for power & charging status, including a charging LED which will blink when the battery is full. If the charger gets too hot from high-speed charging, it will slow down the charge rate automatically. You can easily adjust the charge rate up to 1.2A or down to 100mA.
We also toss in an free JST cable!

Use USB or DC power - 5 to 12V input
Charges one single-cell 3.7/4.2v batteries (not for older 3.6/4.1v cells) with constant current/constant voltage
Three indicator LEDs - green for Power, orange for charging and red for error
Charging LED will blink when the battery is full
You don't have to worry about heat dissipation in the charger, even when plugging in a 12V DC power jack - thermal protection inside will slow down the charge rate to prevent damage
2 JST connections so you can keep the battery plugged in and powering your project
Terminal block connections galore (if you don't like JST connectors) just solder in 3.5mm terminal blocks
Default charge rate is about 280mA, but you can easily change this by soldering in a through-hole resistor on. The chip can do 100-1200 mA charging
Safety timer will stop charging after about 14 hours
The chip supports a standard 10K thermistor, which we have stuffed as a standard resistor. You can solder in a thermistor easily
Lots of information in the datasheet for the MCP73861
Fully assembled, tested and comes with a free JST cable
Schematic available for your perusal
Dimensions: 1.75" x 1.6"

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charger



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USB_Single_Cell_LiPoly_Charger

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LiPoly Charger - Single Cell 3.7-7V Input

sku: PRT-00726

Replacement: PRT-10161. The MAX1555 was discontinued. We have a new version using a new IC. This page is for reference only.

Description: This is a Polymer Lithium Ion battery charger based on the MAX1555 IC. This charger uses either USB bus power (MAX1555 internally limits this to 100mA) or 2.1mm center positive wall-wart power (MAX1555 internally limits this to 300mA). Current is automatically reduced to a trickle when charging is complete. Cheap, easy to use, and flexible, this board serves as a great demo board for the MAX1555. This charger is a 'must have' for quick and clean charging of Lithium Polymer chemistry batteries.

Check out this iPhone Charger!

Features:
Intelligent IC monitored charging - Constant current/Constant Voltage
Do not use this charger to charge NiMH, NiCd, or any other battery type
Comes fully assembled and tested
Single Cell Charger
Requires 3.7V to 7V(max!) Input
MAX1555 will automatically choose the wall-wart charging if both USB and barrel jacks are connected to power
Separate header for external power in
Separate headers for battery and load system so batteries don't have to be removed for charging


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12vBatteryCharger


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charger



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charger

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