Batteries for SLT A35 and some questions on camera batteries in general

[tce]

Are there other batteries compatible with the SLT A35 other than InfoLithium NPFW50 (i.e., the battery that came with the camera)? I was disappointed when I found out that the Canon 1100D can take close to 800 shots on full charge.[1]

Also, is it safe to leave the battery in the charger overnight? I know for a fact that this isn't a good idea for laptops so I was wondering if the same principle applies to camera batteries.

Lastly, do you have any metric to decide if a camera battery is up for replacement? Again for laptops, I have this rule that if I only get something like 1 minute per 1% of charge, battery needs to be replaced. Anything similar for cameras?

[1] Canon 1100D vs Sony SLT A35

[PWhite214]

Sony specs show 1080mA hours which seems pretty low to me. Some of the aftermarket batteries on EBAY say their capacity is 2200mA hours, more than double.

TWO BATTERY 2200 mAh Li-ION FOR SONY NP-FW50 a NEX-7 NEX-5 NEX-3 NEX-C3 A35 A55 | eBay

While I have never had any problems using aftermarket batteries and chargers with my sony DSLRs, I have read posts from some discouraging their use.

Phil

[lostsmitty]

I bought my A330 in March 2010. I bought a Vivitar VIV-SB-FH50 with 1500mAh rating. I think the original battery, NP-FH50 is 900mAh rated. The original battery isn't holdng a charge anymore and I've been looking for another battery. I have found these Sony batteries rated at 900, 1000, and 1250mAh.

I can find the Sony battery for $60. I have found the Vivitar replacement rated at 2300mAh for a lot less.

I think we have the same question...is it ok to use the higher capacity batteties. It's my understanding the higher mAh rating lets you shoot more pictures.

Is there a difinitive answer out there?

[PWhite214]

The rating refers to how long a battery can discharge at an acceptable voltage. In theory and in round numbers, a 1000 mAh battery can produce 2mA continuously for 500 hours while a 2000 mAh would last 1000 hours.

I have always purchased batteries with the highest mAh rating listed. As long as the voltage stays within the camera limits I cannot see any reason to think the higher rating would cause any problems. I sure haven't had any.

Phil