The new forums will be named Coin Return (based on the most recent vote)! You can check on the status and timeline of the transition to the new forums here.
The Guiding Principles and New Rules document is now in effect.
Battery question
MKR
Registered User regular
Registered User regular
I ordered two of these: http://www.amazon.com/gp/product/B007JL60U2/
The shipper sent two that have "680 mAh" printed on the side instead of 900. I contacted them about it, and got this in response:
I know next to nothing about batteries, so I can't say whether or not this is true. It seems weird, but I know how common it is for different standard measurements to show up.
The shipper sent two that have "680 mAh" printed on the side instead of 900. I contacted them about it, and got this in response:
The battery you got is the correct battery.
Different manufactures use different scales to measure the mAh, but they all meet the specifications of the OEM and have the same output and usage time. If you would prefer we can exchange it for ones that have a higher printed mAh, but it would give the same amount of usage time.
I know next to nothing about batteries, so I can't say whether or not this is true. It seems weird, but I know how common it is for different standard measurements to show up.
0
Posts
Like I said, I don't know anything about it and maybe it's not even a big deal, but it seems sketchy to me.
Now if they'd sent you an email ahead of time saying "sorry, we seem to be out of stock but these work just as well because of X, would you like them instead?" that would be different somehow. But they didn't do that, they just shipped you a different item.
Manufacturers using "different scales to measure the mAh" sounds like a load of shit--it's not something that's difficult to measure or standardize. You either have a given capacity or you don't, and 680 mAh at 3.6 volts is less than 900 mAh at 3.6 volts.
this.
*clears throat*
CARRY ON
Am I misapplying concerns for one thing to another?
The issue is, the seller doesn't know anything about what camera you have. They know only that you ordered X battery, and they gave you battery Y along with a seemingly bogus dismissal.
polite rage though, until I get the correct battery
edit: I misread. I didn't check to see if they had a 680.
edit: they don't have a 680
Can you list the exact specs of the batteries you ordered, and the ones that were delivered?
I don't really see how 680 mAh can be the same as 900 mAh... like CycloneRanger said, at a fixed voltage for both of these ratings, it literally means the one with the lower number has less energy stored in it.
As far as I know there is no danger or risk of damage of using a battery with a higher mAh rating, but I'm not 100% on that.
If the voltage was off or the battery clearly wasn't designed for the application then I would be more concerned.
On the plus side, what I paid for it appears to be the normal price for the battery. Even the 900 mAh batteries are around that price, no matter which brand is on it. I'm still going to get them to swap it out, but it's probably just ignorance on the part of the support person.
(you could try counting the number of photos that a known good original battery will take, then compare that to the number of the new battery and see what that tells you, I guess -- that's what really matters in the end, after all)
It's possible I'll shoot more with a more portable camera than what I've been using. If that's the case, I'll shell out almost half the camera's value for a Canon battery just to be sure.
Lithium ion batteries almost always require a management system (BMS) to monitor charge levels and ensure safe charging. For larger batteries, these are built into the battery (think laptop batteries with their LED charge-level indicator: That's the BMS). Probing a lithium ion battery and accurately determining its state of charge (SOC) isn't really possible. The best way to do it is to count the energy coming in and count the energy going out. That's why the BMS is built into the battery-- It can't ever get detached from its counter.
Since this is a tiny lipo pack, there is a possibility that it doesn't have its own BMS and depends on the camera to monitor the battery health. Thus, it is possible that the camera's firmware is only expecting 650mAh, and when charging only goes up that high and then stops. I have no inside information about how Cannon programs their battery management, I'm just saying that there are a few possibilities. Definitely get your money back or a pack rated for 1000mAh, as other posters have said they are not equivalent packs.
for cameras, flashes eat up a ton of power, so generally the higher amp-hour rating the better. does your camera have a separate charger for the battery (i.e. you remove the battery to charge it, like a cordless drill)? because if it does, then the charging station is much more likely to be able to handle a variety of amp-hour ratings. if it charges inside the camera body itself, then that likelihood drops significantly.
Registered just for the Mass Effect threads | Steam: click ^^^ | Origin: curlyhairedboy
As long as the voltage is the same, you can use whatever mAh batteries you'd like.
A higher voltage is the thing that damages electrical equipment. (Technically, not accurate, but for casual purposes, its true)
You have the choice of going through the hassle to get a return, or accept that you were scammed and move on like many of the previous purchasers have done (as evidenced from the "got the wrong item, but it works the same" feedback)
Amazon's marketplace policies do allow for equivalents, and I have no reason to object if it really is equivalent to what I ordered.