Alkaline vs NiMH batteries


Status
Not open for further replies.
A

Altec

Guest
#1
Noticed that alkaline batteries are 1.5V while NiMH batteries are 1.2V. Does that mean that NiMH batteries give poorer performance e.g. less powerful flashes?

Any idea how many mAh does a typical alkaline battery have?
 

#2
Originally posted by Altec
Noticed that alkaline batteries are 1.5V while NiMH batteries are 1.2V. Does that mean that NiMH batteries give poorer performance e.g. less powerful flashes?

Any idea how many mAh does a typical alkaline battery have?
No. Alkalines might have a higher voltage, but internal resistance is higher than NiMHs and they cannot sustain supplying a large current for long. So, in digital cameras, they typically die after 10 minutes or so of usage.

NiMHs can provide high current to the appliance being powered for a period of time, afterwhich they die pretty quickly and needs to be recharged.

Regards
CK
 

mpenza

Senior Member
Jan 18, 2002
12,938
0
0
Singapore
www.instagram.com
#5
Alkaline have ~3500mAH. But they do last as long in digital cameras as they are not well suited for high current drain usage.
 

YSLee

Senior Member
Jan 17, 2002
2,326
1
38
Visit site
#6
Another point to note that alkaline's 1.5v is applicable only when the battery is darn fresh. After some time, the voltage level will drop, sometimes below 1.1v even!

NiMH on the other hand, has different voltage drop off characteristics. Generally it is 1.2v throughout, until when it finally dies, then there'll be a very sharp drop off after that.
 

Status
Not open for further replies.
Top Bottom