Battery Pack vs 2-AAA Batts

sunnyskyez said:

Im new to this site, Thank you for having me.

Im in a battery confusion and Im hoping someone can help me out. Im looking for a new cordless landline. Its between AT&T who use ‘battery packs’ and Panasonic who use 2-AAA-batteries. My present 10+ year old phone is a Uniden, that uses a ‘battery pack’ its also 10+ years old, I have not had to replace that battery pack to date. I can talk for 2+ hours, without having to recharge it. Ive forgotten to replace it in it’s charger for a couple of days and I can still pick it up and talk for 2+ hours.

I lean towards the AT&T because of the battery pack and the HD Audio. Others who love the Panasonic’s have told me that their batteries last for 5 years. But I just can’t get it out of my head that the battery pack’s are a bit better, i.e.: mine is 10+ years old. I do know that things change over the years, but I hoping batteries have only gotten better.

So in simple terms can someone explain the difference between the battery pack and 2-AAA batts?
I know the battery packs are basically 2-AA or 2-AAA batteries put together and have 2 little wires that have a plug at the end which plugs directly into the phone, does this make some kind of difference?

Thanks so much for anything you can tell me.

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Hillhater said:

To clarify..
The “pack” battery is a rechargeable battery that automatically recharges when the phone is on the holder.
Usually those are NimH type cells, though some modern phones may now use lithium.
I cannot tell from what you have posted , what those AAA batteries in the panasonic are, but they are most likely rechargeable NimH cells also ( yes the same , just individual cells) and also recharge when on the holder.
BUT.. if they are “primary cells” ( Energiser etc) then that is a different game.

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Drunkskunk said:

My old Sony, bought back in 1993, had it's first battery replacement about 2009. That battery kept working with 2+ hours talk time until I retired the phone in 2017. NiCad last forever.

That said, some battery packs are hard to find a few years after the product is discontinued. AAA batteries have been around since 1954. if you still have that phone in 25 years, you'll more likely be able to get new AAA than the other phone's battery pack.

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markz said:

AA and AAA is just sizing because its the same voltage, but difference Ah and Wh (how long you can talk on that phone)
AAA's are smaller, hence lower Ah and Wh capacity, means you talk for less, also they are Alkaline so again lasts not as long.

I'd go with a rechargeable Lithium battery pack in the phone if available.

I've use Vtech for 19 yrs now and have had no issues with its rechargeable process.


Hi markz,
What phones would use lithium? None of the companies I researched show lithium's. Can you use a lithium pack in place of a Ni-Mh pack?

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