umm 1.5v li-po rechargeables whats the deal here

[joeyss]

4pc Znter 1 5V AAA 400mAh Li Po Rechargeable Lithium Battery USB Charging Line | eBay


They charge usb at first at I thought they were just selling 1.5v primary cells but i found this site

1.5V lithium ion battery | KENTLI battery wholesale | KENTLI rechargeable batteries

they sell 3.7 li-ions but with software that keeps them at 1.5v.

Anyone here know anything about this?

 

[Cyparagon]

They have two terminals on the positive side. An outer ring is at the standard 3.7V potential with direct connection to the internal lithium cell. There's presumably an internal regulator to provide 1.5V to the standard center terminal. I'd guess linear regulator, but I'm not sure. They have poor capacity as a result. I'd stick with other tech.

 

[Rivem]

They have two terminals on the positive side. An outer ring is at the standard 3.7V potential with direct connection to the internal lithium cell. There's presumably an internal regulator to provide 1.5V to the standard center terminal. I'd guess linear regulator, but I'm not sure. They have poor capacity as a result. I'd stick with other tech.

I agree. I've never seen a battery that didn't output it's type's voltage with a switching regulator (more efficient). They probably exist though. Though it's uncommon, I have seen some with linear regulators, and I'd guess this is how these function as well. These were in single-cell applications where somebody could have just put a regulator on the device PCB though.