Halcyon Two 2000 mAH Lithium Ion Replacement Battery and Charger Kit for Sony NP-F550 and Sony HDR-FX1, HDR-FX1000, HDR-FX7, HVR-HD1000U, HVR-V1U, HVR-Z1, HVR-Z1U Digital Camcorders

Second seller, second perceivably different product being sold. Both sold the same "HAYLCYON" Carger which works. However the batteries:HALCYON NP-FM500h do NOT have the same physical size or layout as a NP-F of any kind. They have 3 contacts( vs 2 on the NP-F ) and a much shorter body which will not fit into hardware designed for the NP-F type battery which is LONGER.The first order I was able to print out a return slip for, THIS one is telling me to contact amazon about the return due to what I assume is the 'hazardous' lithium.Be careful about buying this. It will NOT fit a regular NP-F I bought it for a F&V 300 led light which it was listed under regularly bought with.....

I am very satisfied with the performance of the batteries. They charge quickly and hold their charge well. The charger is a little flimsy and the flip-out AC plug is very convenient. The included car charger is a nice bonus.

In April 2014 I purchased this combination -- two batteries and a charger -- and also purchased six of the same type batteries -- Sony NP-F550 -- plus a two-battery charger in the MaximalPower brand. I use the batteries in four identical LED lights for some photography. The use is occasional, not constant.As I was recharging all the batteries for a shoot coming up this week the two Halcyon batteries would not charge beyond 50% while all six of the MaximalPower batteries charged correctly. I'm sticking with MaximalPower brand for the future starting with purchasing two more to replace the inferior Halcyon ones.

much better than expected, certainly worth what i payed for it. They keep charge good enough to get work done.

These seem to be well made reliable batteries. We will see in the future. Arrived quickly!

Ordered two since having 2 cameras and I really didn't think the batteries would hold a a good charge. Gee was I wrong... Above and beyond my expectations! I going to order more since I'll be doing long shoots..Can't afford down time due to lack of power.

I couldn't find ths any were, thank you Amazon. This is just a great price, just what we needed, I thought I was going to have to get rid of the camera.

These batteries last about 15 minutes, fully charged, on my Yongnuo Professional LED Video Light Flash YN300. My other batteries, the Maximalpower DB SON NP-550, easily last 50 minutes on the same LED lights.