Replacing a 9v battery
#1
03-20-13, 12:22 PM
Replacing a 9v battery
Hi, I want 9v dc power supply and that must be slim so i cannot use a 9v cell .
Suggest a better option for it.
Can i use 3x3v button cells in series
or
cell phone battery (3.7v + 5v) in series
How to connect cell phone batteries ? They have 3 terminals +ve -ve +ve respectively. Are the 2 +ve terminals same or what ? Can i connect them to get ~9v
or what if i open a 9v battery ?
Suggest a better option for it.
Can i use 3x3v button cells in series
or
cell phone battery (3.7v + 5v) in series
How to connect cell phone batteries ? They have 3 terminals +ve -ve +ve respectively. Are the 2 +ve terminals same or what ? Can i connect them to get ~9v
or what if i open a 9v battery ?
#2
03-20-13, 12:27 PM
Group Moderator
Welcome to the forums.
We need to know what the device is you are powering. Current consumption plays a part in battery selection.
Be very careful when modifying cell phone batteries. They are lithium which can be unstable when shorted or heated and can explode.
We need to know what the device is you are powering. Current consumption plays a part in battery selection.
Be very careful when modifying cell phone batteries. They are lithium which can be unstable when shorted or heated and can explode.
#3
03-20-13, 03:03 PM
I'm using a wireless camera with 300mA Current consumption and
no problem with the temperature my batteries have heat resistant plastic case they can be operated upto 60¤C and i'm not just connecting in series
no problem with the temperature my batteries have heat resistant plastic case they can be operated upto 60¤C and i'm not just connecting in series
#4
03-20-13, 10:36 PM
Group Moderator
An alkaline 9v battery is rated for about 500 mah of life.
An average useable consumption is 15-20 mah.
So if you were to connect that camera to that 9v battery you would be looking at about an hour of life.
Cell phone packs are rated for several AH's so they would be a better choice depending on what amount of run time you are looking for on that battery. The two + terminals are connected together.
You were talking about taking apart battery packs. I was just warning you in case you were thinking of soldering on a lithium cell.
An average useable consumption is 15-20 mah.
So if you were to connect that camera to that 9v battery you would be looking at about an hour of life.
Cell phone packs are rated for several AH's so they would be a better choice depending on what amount of run time you are looking for on that battery. The two + terminals are connected together.
You were talking about taking apart battery packs. I was just warning you in case you were thinking of soldering on a lithium cell.
