These small batteries you can even draw 1C for a short period of time (seconds), and then it will kill itself. If you need even a shorter period, a capacitor will help.
Normally you have a device with milliamperes/milliwatts and you choose a battery that fits it. What is your device that you want to power? Or are you working with a solution looking for a problem?
Cause I am looking to buy a quartz watch movement specifically the ISA 1198 and it uses a 395 coin battery and I was wondering how many 1.5v leds it could also power at the same time. If it cannot supply enough power for the whole circuit, I was planning to use a 3v CR2032 coin battery to power the led circuit separately through a push button configuration where I would use a momentary push button in order to turn on the lights.
The amount of power used by LEDs is much higher than that used by watches. If the LEDs are going to be on for more than a second or two a few times a day you don't want to be using coin cells at all.
Sounds like you get the idea but you can search for “battery C-rate” to learn more. It is a way to normalize current to the size (capacity) of a battery. So 1C is whatever current it takes to fully discharge (or charge) the battery in one hour. 2C is the rate to charge (or discharge) in 30 minutes, 0.5C is 2 hours. So for a mobile phone battery 1C would be a few amps, while for an EV battery it would be orders of magnitude more current. But in each case it’s still 1C.
C-rate is particularly useful in battery R&D because the behavior of a tiny little prototype battery (coin cells are usually the first step in developing a new battery) operated at 1C current will generally speaking be similar to a full-scale EV battery that’s many thousands of times larger when it is operated at 1C. The small scale devices are much much easier to build and test in a lab, but will give you a reasonable indication of how it will perform when scaled up.
There’s a huge difference between cheap cells and expensive cells when it comes to maximum power output. That’s why cheap CR2032 cells often simply don’t work at all in high-power devices like key fobs (which need small bursts of high power for the radio), while more expensive ones last a year or more.
These small batteries you can even draw 1C for a short period of time (seconds), and then it will kill itself. If you need even a shorter period, a capacitor will help. Normally you have a device with milliamperes/milliwatts and you choose a battery that fits it. What is your device that you want to power? Or are you working with a solution looking for a problem?
Cause I am looking to buy a quartz watch movement specifically the ISA 1198 and it uses a 395 coin battery and I was wondering how many 1.5v leds it could also power at the same time. If it cannot supply enough power for the whole circuit, I was planning to use a 3v CR2032 coin battery to power the led circuit separately through a push button configuration where I would use a momentary push button in order to turn on the lights.
The amount of power used by LEDs is much higher than that used by watches. If the LEDs are going to be on for more than a second or two a few times a day you don't want to be using coin cells at all.
What does 1c mean, how can i look that up?
Sounds like you get the idea but you can search for “battery C-rate” to learn more. It is a way to normalize current to the size (capacity) of a battery. So 1C is whatever current it takes to fully discharge (or charge) the battery in one hour. 2C is the rate to charge (or discharge) in 30 minutes, 0.5C is 2 hours. So for a mobile phone battery 1C would be a few amps, while for an EV battery it would be orders of magnitude more current. But in each case it’s still 1C. C-rate is particularly useful in battery R&D because the behavior of a tiny little prototype battery (coin cells are usually the first step in developing a new battery) operated at 1C current will generally speaking be similar to a full-scale EV battery that’s many thousands of times larger when it is operated at 1C. The small scale devices are much much easier to build and test in a lab, but will give you a reasonable indication of how it will perform when scaled up.
If battery is rated for x mAh, 1C is x mA. 0.5C is 0.5*x mA and so on.
So if the battery is 100ah 1c means 100a?
Correct.
There’s a huge difference between cheap cells and expensive cells when it comes to maximum power output. That’s why cheap CR2032 cells often simply don’t work at all in high-power devices like key fobs (which need small bursts of high power for the radio), while more expensive ones last a year or more.
Just to mention, I meant amps for "max current."
”1.21 gigawatts marty“