Camera power supply

I got the Panasonic Lumix S9 as a facecam for YouTube videos and Twitch. I've actually seen that it shouldn't necessarily overheat very quickly in 4K if you use a dummy battery. So I bought the Patona PAN DMW-BLK22. However, it doesn't really work that well. After about 90 minutes the overheating symbol appears. It also feels very cheap, as it doesn't actually weigh anything. Does anyone have any experience of which dummy battery might be better? Would the Panasonic DMW-DCC18GU coupler perhaps be better?

After searching for ages for a safe and reliable charger, I came across a brand on Galaxus that has a good name among professionals, but is only shown if you explicitly search for it. Mostly Pantona and similar cheap chargers are recommended or suggested. To be honest, I have absolutely no confidence in cheap chargers. I know about LIPO batteries and how dangerous they can be if handled incorrectly. If LIPO batteries start to burn, you can't put them out. LIPO's should be charged slowly, ideally and gently is 1C, which means, if a LIPO battery has 2200 mah, it should be charged with this number at most, i.e. with 2200 mah. Cold and heat can damage or even destroy LIPOS, especially with heat. Therefore, never leave LIPO batteries in the car in direct sunlight. LIPO batteries should be stored for a long time with at least 35% and at most 50% charge capacity. Every six months, briefly reconnect unused LIPO batteries to the charger until the impedances are correct again and the battery is not undercharged. A good charger that displays the charging capacity accurately is crucial for the charging process and for storage charging. If a LIPO battery begins to swell, dispose of it immediately in a designated place, preferably in an electrical shop where the battery was purchased with or without the accompanying device. All LIPO batteries should be stored in a non-flammable container called a "Lipo Bag" or similar. If you treat LIPO batteries correctly, they can provide many years of good service. The important thing to expect from a good charger is that it balances the cells correctly when charging, and that it charges 100% per cell to 4.2 Volts but not more. I also expect a charger to maintain 4.2 volts per cell until the user stops charging. I believe I have found a very good charger at Galaxus, Fxlion PL-6000SL, which charges at 1500 mah according to the manufacturer. Even more professional chargers are available from FxLion and can charge up to 4 batteries at a time, and do so relatively quickly. Link to Fxlion PL-6000SL at Galaxus, which I ordered for Sony NP-F970 batteries : https://www.galaxus.ch/de/s1/product/fxlion-pl-6000sl-ladegeraet-video-zubehoer-13104388 Really good chargers for Sony NP-F970 and other LIPO camera and camcorder battery types are more in demand than cheap devices and especially wanted by owners with expensive cameras and their accessories like from Atomos etc.. FXlion is clearly the right choice for Galaxus. On one website, I won't mention the name, I saw a professional charger from Flixon for charging two Sony NP-F970 batteries at the same time for Eur 238, which could be about the same price in CHF +/-, the four-battery charger is sold at a higher price. Link to the manufacturer: https://fxlion.net/dv-charger...