I thought I'd share some tips on managing your batteries. This is from an Olympus user, but probably applies to Panasonic as well. Feel free to add more tips and hacks. I know most people work out their own methods. Camera batteries: - If you shoot for extended periods of time (like whole day of sports or events), get 4 or 5 batteries. You can buy them over time. - Get an extra charger, or two. Last thing you want is to stay up all night to charge them one by one. - For chargers with Figure 8 plugs (C7) like Olympus, get Apple charger prongs: https://www.mu-43.com/threads/40243/ or similar. No more dangling cables and you can plug them straight into the wall. - Label your batteries (say, number them) and use them in the right order. This way you'll always know how many you have left and when to start recharging. You'll also know which ones are empty (below the number that's in the camera). - Carry two little battery bags or boxes with you, one for fresh ones and one for empty ones - When you buy a new camera, buy it with an extra battery (less financial damage with a bigger purchase), this way when you go through two bodies you'll have at least 4 batteries already, that's if they are still compatible. - When shooting with a grip, always set the battery priority to the grip battery (Oly at least), and keep replacing it. you'll be left with the body battery as a backup, and with some training you'll be able to replace the grip battery almost while shooting, without taking your eye off the viewfinder. The subject of third-party batteries may come up - this is up to you. I use original batteries only - my choice and I'm not changing it. I've had a cheap battery swelling up in my old iPhone overnight until it looked like a blowfish and cracked. I also tested the first BLN-1 clones: DSTE, non-decoded and their capacity was useless, but this was over two years ago, maybe things have improved since. Flash batteries: - Also label your flash batteries. Flash will use 2 or 4 AAs - label them by sets, like A1..A4, B1..B4 etc - you will know what's what if you borrow batteries for some other device, and you will ensure the sets are charged together and will thus age together. - For flash, use Sanyo Eneloop Pro (sold as Sanyo XX until recently). Their self-discharge rate is amazingly low. Charge them and forget about them, absolute win if you only use your flash occasionally. There are other similar brands. - Some flashes have battery holders (batteries slot into the holder, not the flash) - buy an extra holder and put spare batteries in it. - Buy an emergency set of high performance, non-rechargeable AAs, Lithium or something. Drop it in the bag and forget about it. It's for emergencies, you see.