Ultimaxx Replacement for Canon LP-E19 Lithium-Ion Rechargeable Battery, Compatible with Canon EOS R3, EOS-1D Mark III, EOS-1D Mark IV, EOS-1Ds Mark III, EOS-1D X, EOS-1D X Mark II, EOS-1D X Mark III

Excellent & Reliable !! I am very impressed.

I've been using it for a couple of days and it lasts as long or perhaps longer than original.

Lasted about a year, had maybe 4-5 charge cycles on it. Put it on a charger recently, and the charger didn't even detect the battery (this was a charger that had previously worked with it). Checked it with a multimeter and it was outputting zero volts. Junk.

The camera recognize the battery once I get it to fit. Is does not go in easily, I have to force it in so I will be returning it.

All of my other batteries have lasted for hours on a charge while shooting sporting events when first purchased. However, this one lasts an hour to and hour 15 min tops. When I look at the battery health on the camera is only reports it as moderate. Wish I could return it but I’m past the window. Do not purchase this one unless you’re looking for a bargain and don’t need the charge to last. Changing batteries mid shoot is unnecessary and a pain.

This is a great replacement battery. It arrived just in time to shoot some great photos. Now I have a second battery!

Good value

Battery arrived in an opened package and appears to be used or at least old. It fits in my 1DX Mk II but wouldn’t turn the camera on. I put the battery on my Wasabi charger, and it says the battery is fully charged. I’m returning what appears to be a used or defective battery.

Arrived on time, battery fit camera, charged well, holding charge so far. Can’t beat the price.