It's *probably* fine. Most power adapters are just transformers, which means they take the wall current and change to the lower voltage with the different sized coils of wire. Then they rectify the AC current into DC. Since wall voltage varies pretty drastically (anywhere from 105ish to 125ish volts), that means actual measured voltage at the barrel connector is usually just a decreased factor of the wall current. (12v is easy to explain, as the transformer is generally a 1 to 10 winding ratio, so 120v wall current means 12v as it's reduced by a factor of 10) The 6v connector is probably rated at 6v based on a 1 to 20 winding ratio, giving 6v with a 120v wall current. But since it varies up and down, there's usually wiggle room. It's possible a really fancy power adapter could have circuitry to supply exactly 5.3v, but that's expensive, and especially with battery charging, there's usually wiggle room. (batteries are charged at a slightly higher voltage than they provide, that's how we "push" the energy into them) With less than a volt of discrepancy, I'd probably use the 6v power supply. That said, "5.3v" is an oddly specific voltage, so maybe the original power supply was a weirdly expensive model with fancy circuitry. If you have a multi-meter, you could always check what the actual voltage coming out of the barrel connector is. And if it's a particularly expensive camera, maybe buy a replacement original. That was a long-winded way to shrug... sorry. :)

Perfect answer. The book for the camera actually said 5.2 v 1.0A the charger reads 6v 1.3 A. I tested charger and got 6.3V. Still okay? It seemed to work okay it charged battery fine. Bottom of camera a little warm but don’t know if that is normal when charging.

That’s incredibly kind, thank you!

That's... complicated. :) A charger generally does a few things. It has a voltage slightly higher than the battery provides (battery chemistries are different, so the exact voltage delta varies by battery), and they "listen" to the voltage of the battery itself, so when it reaches a certain voltage, it stops feeding it power. Once the "fully charged" state (again, varies based on the battery and the battery chemistry) is achieved, most battery charges will keep a "float charge" going, giving the battery just enough energy so that it stays topped off, but isn't being actively charged at the higher voltage/amperage used for active charging. So technically yes, you can charge a battery with an adapter providing a voltage higher than the battery's current charge, as the energy will flow from the place of higher voltage to the one of lower voltage. The amperage the adapter can provide determines how "fast" that charge will be sent. BUT (and it's a big but), an actual charger has circuitry to make sure the battery isn't overcharged. And especially with lithium-based battery chemistries, that's a very, very important feature, as lithium batteries which are overcharged tend to get explodey. Hopefully that makes sense...

Can I use 5 Volt and 2 Ampere instead of 6 Volt and 0,3 Ampere ?