What discharge rate li-ion battery to use?

[RADU2975]

I want to build a blue 1.6W 445nm laser(OSRAM PLTB450B) with a boost driver .
I have some high discharge li-ion witch puts out 20A(samsung 25r) will this fry/kill everything?

 

[Dusty_Lenses]

I want to build a blue 1.6W 445nm laser(OSRAM PLTB450B) with a boost driver .
I have some high discharge li-ion witch puts out 20A(samsung 25r) will this fry/kill everything?

I dont see the driver pulling much more than 2 -2.5A. Aside that, the rating is what the battery is capable of in terms of current. As long as it meets the voltage criteria,, it wont make any difference.

 

[Photon Master]

Which size? 18650?

 

[Dusty_Lenses]

Which size? 18650?

Samsung 25R 18650 2500mAh 20A Battery

The Samsung 25R is the most widely sold and respected 18650 battery on the market, today. This cell is of very high quality and has a very economical price

www.18650batterystore.com

 

[Photon Master]

I’ve been using 3000 mah Samsung 30q for years… they hold their capacity really well too over many charge cycles.

This site might help you too: http://batteries.parametrek.com/index.html?size=18350&features=flat top

Be sure to know if you need flat top or button top. I ordered the wrong kind once

 

[RADU2975]

I dont see the driver pulling much more than 2 -2.5A. Aside that, the rating is what the battery is capable of in terms of current. As long as it meets the voltage criteria,, it wont make any difference.

The driver imput is 3.7V ,but I don't know the max amps imput or it dosen't matter?

 

[Photon Master]

The “3.7 volt” thing caught my eye. I usually charge my batteries to 4.2 volt. I wonder if doing so in your case could damage your device? My chargers allow me to set the max voltage and the charging current

 

[Dusty_Lenses]

The driver imput is 3.7V ,but I don't know the max amps imput or it dosen't matter?

do you have a link to the driver or a number on the IC?

 

[RADU2975]

do you have a link to the driver or a number on

It has 3r3 chip on it witch I know is pretty good

do you have a link to the driver or a number on the IC?

I can't share links because I don't have 20 posts yet but in the descripsion says one li ion battery

 

[Dusty_Lenses]

It has 3r3 chip on it witch I know is pretty good

I can't share links because I don't have 20 posts yet but in the descripsion says one li ion battery

3r3 is the inductor, id need the tiny code on the chip with 6 - 8 legs, possibly more legs. If its meant for a li ion then typically 4.2v will be fine as most cells are 3.7v nominal but 4.25 fully charged

 

[RADU2975]

Found chip code , LM358

 

[Dusty_Lenses]

Found chip code , LM358

Havent seen many boost boards using an opamp outside of current control feedback on a CV IC. But if thats the only chip, you'll be fine with an input voltage of 4.2V, just dont exceed that like using 2 batteries or you risk blowing both the driver AND diode.

-Industry-Standard Dual Operational Amplifiers

1 Features •

Wide supply range of 3 V to 36 V (B, BA versions) • Quiescent current: 300 µA/ch (B, BA versions) • Unity-gain bandwidth of 1.2 MHz (B, BA versions) • Common-mode input voltage range includes ground, enabling direct sensing near ground • 2-mV input offset voltage max. at 25°C (BA version) • 3-mV input offset voltag