Generic NP-BG1 battery for my Sony DSC-H20
348093
Got this pretty quick.  Only took a few days to get it but I made sure I ordered from a U.S. seller.  So far works fine.  I keep hitting the view button on my camera about twice a day and so far the charge is holding like the name brand battery that came with the camera.  Very satisfied with my purchase.
2692126
These are way cheaper than SONY brand batteries, do exactly the same thing, good quality control.  Save money, buy this generic substitute instead.
535278
This is not the same size as a Sony NP-FV100 it is slightly larger. Will not fit in any camera with an internal battery compartment. Such as the Sony HXR_NX70. The battery does work in my other Sony's with the rear external battery location as well as my fill light and field monitor with a Sony bracket.  It  does perform well with a similar discharge rate to my Genuine Sony batteries and at a reasonable price.
3528444
I bought a generic Chinese "equivalent" bp-511 battery that boasted a higher milliamperage rating and a cheaper price than the original Canon battery that came with my camera.  The battery worked fine for about 3 months and now only holds a charge for about 20 minutes.  I have had it fail at critical times.  Never ever buy some knock-off Chinese battery--read the reviews.  The Chinese push out their crappy knock-offs to unsuspecting consumers (like I was) just to make a quick buck.  Also, don't trust the glowing reviews from the generic sellers.  They are self-generated.  In my case, the seller is no longer selling under his original company name.  He has a new name with the requisite (sham) glowing reviews.  CHINESE PRODUCTS SUCK.
3071232
Claims to be a replacement for the Sony NP-FM50 battery, but it does not fit my DSC-S70 camera, although on the list of compatible cameras.  Very tight fit...almost could not get it back out!
3341680
In the description it says that the battery fits the Helimax 1sq V-Cam, well it does NOT is bigger than the baterry slot. The should not sell this battery for the 1sq, or 1sq-vcam.
1641354
I have had my old sony battery (plus a back up) for the a390 dslr for four years and they are dying quite quickly (single charge last for 20 minutes). This generic one not only works but also holds up really well, now I can do an hour-long shoot without using half of a fully charged one.
968341
After two quick failures of generic clones of this battery purchased from the internet. I thought that the extra expense of an "official" Sony battery via Amazon would save me anymore headaches and disappointments.  Wrong!  The packaging seemed authentic for Sony but the battery provided me with about ten images, went dead and does not take ANY charge.  The charger is in working order.

Now I need to spend the effort to discover how to receive another battery from either Amazon or the supplier.
1994720
We needed an additional battery (or two) for our Canon ELPH 310 HS camera.  I know that name brand batteries are generally the best, but did not want to pay for another Canon battery which does not have a lot of capacity (only 760 mAH for the Canon NB-4L).  The good reviews convinced me to take a chance on these batteries and I'm glad I did.  I purchased this two pack offer and paid to expedite the shipment and received them in 2 days as promised.  Each STK NB-4L battery (1400mAH) charged fine in our Canon battery charger and fit fine on our ELPH 310 HS camera.  Used them on our vacation where we took over 700 pictures, rotating these new batteries and the Canon NB-4L.  It was so nice to have spare batteries!  We have had them for about 3 months and they still seem to be performing well.  I'm not sure that they last twice as long as the Canon battery but they certainly seem last at least as long as the Canon battery.  The price was very good and I also liked the one year warranty.  I would certainly consider purchasing other batteries from this company in the future.
1109957
Works okay and no concerns with a non name brand battery.
1666136
Was looking for a less expensive replacement for the Sony NP-BG1. This seems to charge quickly and holds the charge without difficulty.  It is also much cheaper than the Sony.  The product was shipped quickly
from the supplier.
4841071
The battery arrived, sealed, in its original Sony packaging. After three weeks of use, and some non-use, I can testify that it holds a full charge, giving me 350 minutes (just under 6 hours) of running and recording time on my Sony HDR-SR11 camcorder, which has a hard drive, making it a bit more of a power hog than a flash memory camera. The battery also discharges perfectly, meaning that if I leave it sitting for a few days without using it, it will have the same amount of power as when I put it down.
The bottom line is that you're getting a perfect, new battery for $20.00 instead of the MSRP $120.00, and it will deliver quickly!
3597778
I found wasabi when getting tired of battery loss with panasonic original battery. I got two batteries and wall/phone charger set. Looking to address same for my canon powershot elph 300HS, again wasabi had similar solution and the batteries are rated almost twice high and works fine.

Will be looking to add wasabi replacement for the Nikon D-SLR battery too..
3838008
This is a factory replacement battery for an APC UPS. It is a piece of cake to install and fits my unit perfectly. It is shipped in a very nice molded Styrofoam protected box to ship undamaged.

Would a non-factory less-expensive equivalent done as well? Probably, but I did not want to take a chance because this was for my work. My hunch is that if you order an off-brand battery with the same electrical specs and same terminals and same or slightly smaller dimensions, you'll be fine.

I have ordered generic replacement sealed lead-acid batteries before without any problems. The only negative I encountered with generics is that they were not packaged well and had little chips of plastic banged off some of the corners. Not enough damage to effect performance, but you might want to inquire about your vendor's shipping container.
2910417
Great battery replacement for Cannon NB-2LH along with charger.
2594479
The Sony NP-BK1 Rechargeable Battery Pack is perfect for the new camera I bought.  It holds true to it's product claims.  I would definitely purchase this again if needed.
4376980
Not a lot to say about a battery.  It fits my NX30 camera just like the original, and seems to have about the same life per charge.  It's a good value.  Now I wish I could find an external charger.