EBL 9 Volt 6F22 Li-Ion batteries

[bdunham7]

Has anyone seen or used these specific batteries from EBL?

http://www.eblmall.com/product/ebl-usb-rechargeable-9v-lithium-batteries-5400mwh-long-lasting-li-ion-batteries

I currently have the other EBL 9V Li-Ion types, the blue 600mA ones that are simply 2 cells in series plus some protection circuitry for 6.6-8.4 volts (which is good for most things because they have low internal resistance) and they require their own charger.  The ones I linked have a USB charger and I presume that they use one cell plus a DC-DC converter.  This would be great for smoke detectors, but I'm wondering if the output is noisy, which might be a problem in things like DMMs and voltage references.