HDM Z1 & External Power Bank?

[dave678]

I love my Z1 Auto CPAP and use the battery packs; however, each pack only lasts one night and they are bulky and expensive.

Has anyone used a Z1 or anything else with an external laptop battery pack like one of these:

XTPower MP-30000 Power Bank
MAXOAK 50000mAh Portable Charger External Battery Power Bank
(Sorry I'm too new to post URLs)

I'd like to know if there is a tip that fits the machine, how long they last, if they will cause my machine to blow up, etc.

Regards,
Dave678