Hi all,
I have a question about charging up series of three 3.7V 110mAh batteries by using battery babysitter(or charger) from sparkfunk.
Here is my goal of this project:
There is a device that I want to use as cordless, like a cellphone battery system. When I'm not charging, the device rely on the battery power, and when I connect the device to the charger then, battery will be charged and the device will rely on wall outlet power.
About the device:
The device originally get 12V 110mAh from an adopter. The input will be split in two ways by LDOs: 5V low drop output (LDO) and 9LDO in the circuit.
What I have:
I purchased three 3.7V 110mAh lithium polymer batteries and a battery babysitter takes input up to 28V, and output range is between 3V and 5.5V.
When I purchased the babysitter, I didn't pay attention to the output voltage range. Thus obviously, I cannot charge 11V battery with it.
I read somewhere that If I have three individual chargers and connect to each battery in parallel then I should be able to charge them up.
But I wasn't quite sure about this.. Because I'm going to use single power source from the wall outlet, and split the input in three ways to feed individual chargers. Then would they have same ground though?
Here is a link of battery baby sitter in case..
https://learn.sparkfun.com/tutorials/battery-babysitter-hookup-guide
Please advice me.. If you have any suggestion please do.
thanks in advance.
I have a question about charging up series of three 3.7V 110mAh batteries by using battery babysitter(or charger) from sparkfunk.
Here is my goal of this project:
There is a device that I want to use as cordless, like a cellphone battery system. When I'm not charging, the device rely on the battery power, and when I connect the device to the charger then, battery will be charged and the device will rely on wall outlet power.
About the device:
The device originally get 12V 110mAh from an adopter. The input will be split in two ways by LDOs: 5V low drop output (LDO) and 9LDO in the circuit.
What I have:
I purchased three 3.7V 110mAh lithium polymer batteries and a battery babysitter takes input up to 28V, and output range is between 3V and 5.5V.
When I purchased the babysitter, I didn't pay attention to the output voltage range. Thus obviously, I cannot charge 11V battery with it.
I read somewhere that If I have three individual chargers and connect to each battery in parallel then I should be able to charge them up.
But I wasn't quite sure about this.. Because I'm going to use single power source from the wall outlet, and split the input in three ways to feed individual chargers. Then would they have same ground though?
Here is a link of battery baby sitter in case..
https://learn.sparkfun.com/tutorials/battery-babysitter-hookup-guide
Please advice me.. If you have any suggestion please do.
thanks in advance.