All Questions
Tagged with lipo battery-operated
20
questions
3
votes
2
answers
356
views
Powering a Raspberry Pi Zero with a Li-po battery
I want to design a circuit to power a Raspberry Pi Zero using a single-cell Li-po battery (3.7 V).
I'm working on a portable hobby project that's required to be battery powered and allows recharging ...
- 131
1
vote
0
answers
110
views
Use 2s LiPo Battery as Battery Cell for Microcontroller
Is there a convenient way to use a large 2s LiPo battery (such as this one) as a power source for a microcontroller and LED strip? Specifically I'm looking for the ability to seamlessly switch between ...
- 111
3
votes
1
answer
108
views
How do you create small devices that can remain "dead" for a very long time without damaging the battery?
I'm working on a product that uses a very small 20mAh lipo battery. The device only needs to operate for 8 hours, and that's not a problem. However, I expect that customers may run the device until it ...
- 7,119
0
votes
0
answers
338
views
Power microcontroller directly from pins on a the LiPo battery charger board
I have a project that runs off a 1200mAh LiPo battery, which can be charged with a Mini-USB charging board to 2-pin JST as shown below.
I want to stow everything in an ABS plastic case and only expose ...
0
votes
1
answer
123
views
Charging a LiPo using Battery Protection Circuit
I have an application where I power an ESP32 from a LiPo battery. Between the LiPo and the ESP32, I have a DW01A battery protection circuit (data sheet is here: https://hmsemi.com/downfile/DW01A.PDF).
...
- 879
2
votes
1
answer
583
views
Why is switching off GND instead of VCC a bad idea in battery powered application
I'm currently tasked with designing a battery-powered device (i.e. it will be connected to two four-cell LiPo batteries, each with a voltage of 14.4V to 16.8V) and am having quite a hard time finding ...
- 83
0
votes
0
answers
490
views
Would this LiPo 3.7v -> 3.3v schematic be feasible?
I'm basing part of my design off of another schematic. It powers an ESP32, which can pull up to around 300mA at WiFi spikes.
I am planning on using a LDO regulator to bring 3.7v LiPo voltage (then ...
- 503
1
vote
1
answer
1k
views
Li-ion vs Li-Po batteries cut-off protection
I am confused with the differences between Li-ion batteries (like 18650) and Li-Po (the flat ones).
I know that basically they are both lithium ion, but when I want to buy I see that LiPos have always ...
- 11
5
votes
1
answer
587
views
Block battery if USB is plugged in
I'm building a battery powered device and I want to make sure, that no current is drawn from the battery, if USB is plugged in (while charging). I know that I could solve this with two diodes, but ...
- 73
3
votes
1
answer
716
views
Establishing Safe Operation Range for Lipo Battery with Buck Boost Converter
I have a circuitry that I need to power up with lipo battery. I need to regulate battery to 3.3V with buck-boost converter, since LDO can not be able to provide required current output and causes ...
- 65
0
votes
0
answers
198
views
Powering and dimming white LED from single-cell 3.7 rechargeable lithium battery (with a 3.3V Arduino mini)
I'm designing a circuit for a handheld project that runs from a 1-cell rechargeable Lithium battery (18650 or prismatic). The circuit powers an Arduino Mini Pro running at 3.3VDC.
The Arduino board ...
- 101
1
vote
0
answers
305
views
Can I put two loads on one battery and both loads draw 3.7v as they expect?
I have a project in mind where I replace the tinny 40mAh LiPO battery of a "smart band" (Like a Mi Band 1) and replace it with a regular 18650 LiPo battery, so it last a long time without recharging. ...
- 153
0
votes
1
answer
649
views
Parallel lipo batteries with mcp73831 charger IC
After reading this very informative blog about load sharing while charging batteries, I'm planning on using an MCP73831 in the same configuration as detailed by the blog for use in a project I'm ...
- 1
1
vote
1
answer
45
views
How much energy do Li-Ions/Li-Pos have below 3.2V threshold?
How much energy does a battery still have when a protection chip disconnects it? I know that such discharging kills the battery, but in some cases it would be useful. For example, in drones: when you ...
- 43
1
vote
1
answer
2k
views
Charging 3 Li-ion batteries in parallel and discharging in series
I would like to design a circuit that charges 3 Li-Ion batteries in parallel with a 1S charger, then switches the configuration to put them in series to discharge as one 11.1V battery pack. This is ...
- 11