[HD2 Accessories] SanFrancisco:
Update on my comments

I was prepared to post a review of the Charger Shell after I bought it.

I did in fact buy one on Wed., July 14, 2010.

However, that night T-Mobile made the Samsung Vibrant available for sale, online. So I bought that phone with the intention of selling my HD2.

So I won't be posting a YouTube review inasmuch as I have returned the Shell.

From the brief time I had it, here's my impressions, that may answer some of your questions.

1. I don't know if it was mine only, but the package did not come with any instructions, spec sheet or anything that would tell me how it works and whatnot. I suspect the T-Mobile clerk dropped it somewhere, or it fell out.

So I can't tell you anything about the device other than what I assume.

2. From the Net and elsewhere, this is a device that charges your HD2 battery. It is not an extended battery in the sense that the two batteries become one, so to speak.

3. To charge this charger battery you plug it into your microUSB adapter charger. A charger is NOT included in the package. In what I assume is to show charging progress there's three white LED lights on the cover. When I connected the charger one light was on, so I assume that meant it was one third the way to being fully charged. Or maybe the lights turn different colors depending on charge status.

4. To install you pull the top of the shell off and slide in the HD2. You then replace the cap. It seems OK, the fit, but once in place the two parts did not seem that solid, at least not to where in about a year or so the two shell pieces would stay connected.

5. The bottom of the shell has the female microUSB throughput. Also there's a 3.5mm opening so you can connect a headset.

The hole seems wide enough to accept most headsets, but if your headset male plug has a wide housing around it, you will be SOL because the opening is about 8.5mm wide. You will also be SOL if your headset plug has a 90 angle on it.

6. The fit around the phone, switches and ports is precise, as it should be since it's an HTC OEM product.

7. The rubberized coating is very nice, the same quality as the HD2 rubberized coating.

8. When you install this you will immediately notice how heavy the phone has become. And I mean it's really heavy.

9. The Shell also adds bulk to the phone. That's not a bad thing though since the reason you are using this, for example, is on a road trip where you want extra battery power. That takes precedence over keeping the phone's slim profile intact.

10. It really adds to the phone in terms of form factor and design. The HD2 actually looked pretty cool with it. The Shell's lines are smooth and pleasing, so adding it to the HD2 does not detract from the HD2's overall pleasing appearance.

11. I did not find anywhere on the package or the Shell what the battery rating is. I could feel the outline of the battery from squeezing the shell. IMHO the battery feels like it's 1100 mAh more or less. But that's just comparing its size to that of other LthIon batteries I have had. For all I know it could range from 900 to 1200 mAh, I simply don't know. So for my GUESS I'll meet in the middle.

Overall impression is that this is far better than getting an ugly extended battery and cover. (The one I bought on eBay is rated at 2400mAh, but the cover has sharp edges and does not look good on the HD2. Of course, many of you may give a rip about appearances. But most people who look at my phones with extended batteries comment how ugly the phone now looks, so I assume looks are important to them. That's why I mention that.)

12. Removing the HD2 from the Shell was not easy. It's "press fitted" into the Shell so when you want to take it out it's difficult because there's little of the HD2 with which to get a good grip when wanting to slide out/remove the HD2.

13. Oh, I forgot. With the Shell on your HD2 is super protected from damage because the Shell surrounds the phone. The only exposed area is the display.

Hope that helps.