BM PremiumFully Decoded 2 Pack of BL-H1 Batteries for Olympus OM-D E-M1 Mark II, OM-D E-M1 Mark III, OM-D E-M1X, BCH-1, HLD-9 Cameras

Great answer for having extra batteries on hand. Works as expected

Works exactly like the Olympus battery, provides proper readout in viewfinder and charges properly on Olympus charger.

I used it for about a week and tested it intensively. The battery percentage display is working properly on the EM1 Mark iii. And has about 80% of the original BLH1 battery performance, the price is only half of the original. I think it's worth buying.

Work and git well, I found they last almost as long as the original battery in my m1 mark iii,

I ordered a pair several weeks ago and have used them both extensively and can say that they are great batteries. They seem to last as long as my Olympus batteries. Very happy with this purchase.

Great so far. lasts a long time with camera use. Only have had them for a month.

Batteries work fine. They appear to operate the camera about the same amount of time as the originals at considerably lower cost.

Note: When purchased, these were labeled as Power2000. They have since been relabeled BM Premium. It's plausible that my results with the Power2000 do not apply to the BM Premium. But given the lack of change in price I suspect that they do.I conducted two tests with an Olympus BLH-1 and the Wasabi and Power2000 fully decoded clones. The first test was a controlled-lighting tripod-mount time lapse on an E-M1.2 at 1 minute intervals with the screen active. The second test was a constant current discharge to 7.2V at a rate which resulted in discharge time roughly matching the number of pictures taken in the first test. The 7.2V cut-off point was chosen as that appears to be when the E-M1.2 powers off - batteries consistently measured around 7.4V after shut-off, which at a 500mA current drops to around 7.2V.As is to be expected, the Olympus BLH-1 matched the best of the two clones that I tested in terms of capacity at around 1500mAh. The Wasabi 2 pack had one battery also measure around 1500mAh while the other was only around 1200mAh. Meanwhile both Power2000 batteries only measured around 800mAh.The only upside of the Power2000 batteries was that the battery status was properly sent to the E-M1.2 I have. In terms of usable capacity they were at just over half of an original BLH-1, and that's when new. Since they lack charge balancing circuitry the usable capacity of the Power2000 would slowly decrease with each charge cycle. Even if the usable capacity were closer to the original BLH-1 I still would not recommend them to most users due to such.For those curious, it is entirely possible that the 18500 cells used in constructing this battery are rated for 1720mAh as claimed by the manufacturer despite only measuring 800mAh usable capacity in this use case. Current high capacity lithium ion cells are designed for maximum energy storage down to around 3-3.2V, not the 3.6V cutoff Olympus built in to their camera - they can still have 45-60% of their usable capacity available when they drop below 3.6V. By comparison, another variant of lithium ion cells that has about 85% the capacity of the high capacity ones has less than 5% of usable capacity left below 3.6V.