Why does Philips recommend 650 instead of 950mAH rechargeable batteries in landline phone handset?

[omega3]

We have a Philips landline phones with wireless handsets and need to replace the rechargeable batteries in it. They came standard with 650mAh and after contacting them Philips recommend replacing them with 650 or 700mAh batteries and not 950mAh or bigger. They say the charging will be faster. While this makes sense, won't the 950mAh batteries give me longer standby time when the handset is not in the charging station?

Hope somebody can clarify this as this confuses me.

 

[WelshBloke]

Won't the bigger batteries actually charge to 650mah faster than the smaller ones? I thought that the charging speed tailed off as the batteries got to capacity?

So the bigger ones will obviously take longer to get to 100% but as they would probably do that overnight when they are I'm the cradle I don't see that as a downside.

 

[Mike64]

Philips recommend replacing them with 650 or 700mAh batteries and not 950mAh or bigger. They say the charging will be faster. While this makes sense, won't the 950mAh batteries give me longer standby time when the handset is not in the charging station?

I would assume so. And fwiw, rather than asking what they "recommend", which is likely to be based on a variety of factors they perceive as being relevant/important to the typical (and totally clueless) consumer, I'd have asked if there was an electrical/electronic reason they're aware of for not using the higher capacity battery, as in, is there any way they know of that it could damage the phone? (Offhand I can't think of one, but what I know about "cordless" phones doesn't amount to much at all.) If there's not, there's certainly no point in giving it a shot.

 

[omega3]

I would assume so. And fwiw, rather than asking what they "recommend", which is likely to be based on a variety of factors they perceive as being relevant/important to the typical (and totally clueless) consumer, I'd have asked if there was an electrical/electronic reason they're aware of for not using the higher capacity battery, as in, is there any way they know of that it could damage the phone? (Offhand I can't think of one, but what I know about "cordless" phones doesn't amount to much at all.) If there's not, there's certainly no point in giving it a shot.

I asked them friday. They say the higher mAh batteries won't fully charge which they see as less good. Not sure though why that's less good.

 

[Mike64]

I asked them friday. They say the higher mAh batteries won't fully charge which they see as less good. Not sure though why that's less good.

Oh, well, that's entirely different kettle of fish... if it literally won't charge to its full 950 mAh capacity (at all) - meaning there's limiting circuitry in the phone that cuts off the juice to the battery when the latter reaches what the circuitry deems to be "full capacity" at 650 mAh, then how could a higher-capacity battery give you longer standby time in any circumstances? Unless I'm missing some fairly subtle aspect of battery chemistry (and I don't think I am), 650 mAh is 650 mAh, whether it's provided by a battery at full capacity or one that's charged only to two-thirds its rated capacity, no?

 

[WelshBloke]

I asked them friday. They say the higher mAh batteries won't fully charge which they see as less good. Not sure though why that's less good.

If thats true then the higher cap batteries should last a lot longer before degrading. Unless they are much more expensive I'd just get the bigger ones.