All Questions
56
questions
1
vote
1
answer
85
views
Can I use a single battery charging ic to charge two batteries in parallel?
I am making a wearable device so for better space distribution I would like to use two smaller batteries instead of a big one. I've been using TinyCircuits's ASR00007 (290mA, lipo) battery which has a ...
- 35
2
votes
1
answer
66
views
High voltage at the Schottky's anode terminal (Hobby Li-Po charger circuit)
I'm pretty new at hardware side of things and trying to teach myself circuit and PCB design just as a hobby, so. bear with me if I'm annoyingly noob for you.
As a relatively simple first task, I ...
- 23
1
vote
1
answer
513
views
Battery charger bypass with diode
I'm a bit of a noob, I have a battery charger circuit connected to a step up converter to get 5V (see 1st image below). The 5V feeds a circuit that draws between 50mA (standby) to 500mA (on).
The ...
- 75
3
votes
2
answers
196
views
Parallel Li-po battery and load with simple charger
I am building my first battery powered board, powered by a 14.8 V Li-po battery. I want to allow the user to continue using the device while charging the battery, and have been reading about load ...
- 41
0
votes
0
answers
891
views
How to solder two 3.7 V LiPo batteries in series and then balance charge them
For a project, I need to power an Arduino Nano 3.3 V BLE. The Nano accepts 5-21 V on its VIN pin and then regulates that voltage down to the 3.3 V it needs. To do ...
- 101
0
votes
1
answer
144
views
AP9211 typical charge + power circuit
I just found that AP9211 chip as cheap and alternative replacement to previous Microchip IC that price has skyrocketed and is unavailable until next year (maybe more).
With previous chip there was a ...
- 211
0
votes
0
answers
89
views
How to do a solar charging circuit and a discharging circuit to a single battery?
I have a solar charge circuit with 6v solar input and a 5 V, 1 A USB output and connected to a 3.7V LiPo battery. Since I needed
battery % display
5 V, 2 A USB output
I needed to add a circuit for ...
0
votes
3
answers
2k
views
Can DC DC converter (CCCV) + BMS charge Lithium Polymer batteries
I need some help in clarifying my understanding on charging Lithium Polymer batteries.
Context:
I am trying to build DIY vacuum cleaner bot. For that I need a LiPo batteries which bot could charge ...
- 21
0
votes
0
answers
100
views
Analog LTC3106 issue
I'm trying to use LTC3106 to provide 3.3V for my SAMD21. The goal is to use the sun when it is available (and recharge the battery with the excess) and use the battery when there is no sun.
Here is my ...
- 5
0
votes
0
answers
81
views
Li4S Battery Full Error - iMax B6
I burnt 3 chargers (Imax B6) simultaneously by connecting Lipo 4s battery in reverse . All showing connection break error. I changed the burnt MOSFET (U5) in all chargers, one charger is recovered and ...
- 159
0
votes
0
answers
38
views
Help me with name of this type of cable to charge my drone.I want usb to female end connector
I have old remote control helicopter in my toys and I want to charge it via USB.But to purchase it online i am not aware of it's name.Help me with name for connector as shown below. Usb to female end ...
- 1
1
vote
1
answer
464
views
Protection IC stopping battery from charging
I'm using an AP9101C as a protection IC and an MCP73811 as a charger IC for a single cell Li-po like this:
The load works fine, but when I connect +VDC (5 V), suddenly CO of the AP9101C goes to 0 ...
- 11
1
vote
2
answers
2k
views
How to charge multiple 3.7V LiPo batteries in parallel?
let's say I have 4x 3.7V LiPo batteries connected parallel.
I want to use TP4056 charger boards to charge them. (see picture)
As a power supply, I use a 5V 15A adapter, so there is plenty of power ...
- 11
0
votes
2
answers
639
views
Simultaneously Charge and Discharge a LiPo
I have what seems to be a rather common problem, a circuit in which i wish to be able to simultaneously charge and discharge (use) a LiPo battery. The "charge" going "into" the ...
- 61
2
votes
1
answer
568
views
Upgrading Bluetooth earbuds case battery
Recently I got Chinese true wireless earbuds called Redmi AirDots. It has 3.7V 300mAh Li-Po battery in it's charging/carrier box that I want to replace with the one with higher capacity. I opened the ...
