I just used my Naztech battery this past Saturday night. In fact, I'd forgotten before going out to the venue to change the voltage setting, so once at the venue I had everything set up and turned on and wasn't getting any power to my preamp, which I had running off my battery. That's when I remembered that I hadn't changed voltage. The battery was kinda pissing me off because I couldn't get the damn voltage to change at all while I was holding that button down. I was starting to sweat a little bit and it hit me that I probably couldn't change voltage with everything connected. So I unplugged the battery and pushed the voltage button again. Sure enough, was able to step through the voltage settings.
So, yeah once everything gets connected up, the battery voltage is 'fixed' at the voltage that has been selected.
(I've already mentioned that I love this battery and I've used it alot and I still love it. AFAIC, it's a better battery than the tekkeon 3450 based on price and capacity.)
This battery looks really nice. I'm worried about the voltage button though. It looks like it would be very easy to press the button by mistake and possibly increase or decrease the voltage to the device that is running on it.
NigelTufnel addressed this issue in one of his earlier posts (see bolded):
Bumping this old thread because I finally ordered one of these from this listing: http://www.ebay.com/itm/18000mAh-Universal-External-Battery-for-laptops-Mobile-Phones-PDAs-iPods-/130691172867?pt=PDA_Accessories&hash=item1e6dcd0a03#ht_3322wt_1131
Arrived after just a couple of days and works as expected. Fit and finish identical to the Naztech battery I already have, except this one is silver, not black.
- You may not be able to lock the voltage (meaning if you bump the voltage selector in use then the voltage may change (description isn't clear on this))
To change voltage on this one and the Naztech, you have to press and hold the voltage button until the display starts blinking, then you can cycle through the options. I have not been able to press and hold to enter the volt selection while anything is actually plugged in to the battery. Seems like it locks you out to protect your gear.
I'm doing a couple of tests with this battery to see how long it will run with some different gear. I'll have it running my hd-p2 until it can't anymore. If it is anything like the Naztech I own, 14 hours running the deck with phantom on should be pretty easy.