yes
Yes, you can use a 700mAh battery instead of a 600mAh battery, as long as the voltage and size are compatible with your device. The 700mAh battery will provide a longer runtime before needing to be recharged. However, ensure that your device can handle the slightly higher capacity without any issues. Always check the manufacturer's specifications to avoid potential problems.
No problem if it's the same voltage, it will just last longer. But it might be significantly bigger, which could be a problem.
It is not recommended to use a higher capacity battery (600mAh) instead of the original one (400mAh) in a solar light without knowing the specifics of the light's design. Using a higher capacity battery could potentially damage the light's circuitry or affect its performance. It is safer to use a battery with the same or lower capacity as recommended by the manufacturer.
If, by 'larger battery' you mean one with the samevoltage but higher capacity - there's no reason why not. It will simply take a little longer to charge it. I swapped my 3.6v 600mAh battery for a 3.6v 1000mAh battery a long time ago - and the phone still works perfectly well.
The amp-hour rating of a battery depends on its capacity. Typically, a 1.5V nickel-cadmium battery may have a capacity ranging from 600mAh to 1000mAh. To find the amp-hour rating, you would divide the capacity (in mAh) by 1000.
I'd verify the output voltage. I charger works by applying a higher voltage than the battery it is charging. If it's within tolerance of the device you're using, it will work. Some devices are more sensitive than others, but in general you should be safe.
A battery that has lost it's charge.
Do you mean 'battery'
The PLIP battery on the Peugeot 307 means that the battery is in need of charging. It can also mean there is a problem with the battery cables or the battery needs to be replaced. Not replacing the battery when necessary can also cause problems for the alternator.
No - so long as it's the correct voltage it'll be fine. The mAh figure is the battery's capacity - the higher the number - the longer it will last between charges in the same piece of equipment. It'll take a bit longer to charge though. I have a mobile phone - which came with a 600mAh battery. I bought a 950mAh equivalent off the 'net and get about twice the talk-time from it. I charge mine through my computers USB port when I need to.
It means get a new battery or the battery is broken.