Provided the battery physically fits where it needs to, and has a voltage which is the same or very close to it, there's no good reason why a battery of higher capacity shouldn't be okay. You'll even get longer operating time from the device.
You can - but it will take a little longer to charge the higher capacity battery.
mAh stands for milli ampere hour and it is a measurement of how many milli amps of current a battery is capable of producing in one hour. Yes you can substitute a battery with a higher mAh current rating provided you use the same battery voltage.
can use 1400mah battery to replace 760 mah
The battery with the larger mAh rating will last longer that the battery with the smaller mAh number will last in the same application.
Yes, you can. According to my vendor, Li-42B actually is same as Li-40B but its mah is higher.
No
No problem to use the 1100mAh in place of the 1000mAh battery. Mah is like store rooms that have varying sizes. As long as the voltage remains the same (the doors of the store rooms are of the same width and height), the battery with a higher mAh can be used.
280mAh :-) , no really, basically it puts out more power. Some devices can handle the extra power, but others can burn up. You take a chance when you use a higher rated battery than what the device was made for.
Yes, it's no problem. a higher mAh should be preferable for use in your camera. "mAh" is A unit for measuring electric power over time, and is commonly used to describe the total amount of energy a battery can store at one time. A higher mAh rating means the (fully-charged) battery can power a device that consumes more power and/or for a longer amount of time before becoming depleted and needing to be re-charged. For example, a battery rated at 1500 mAh can power a device drawing 100 milliamps for 15 hours, or a device drawing 150 milliamps for 10 hours.
A 14.5 foot what? Also a 15.5 foot what?
8.4v 3600 mAh battery.
A 2200 mAh (milliampere-hour) battery carries about 30% more charge than a 1700 mAh battery, but there may be other factors to consider in deciding which one is better for a particular use. A fully charged battery that is rated for 2200 mAh should be able to deliver, for example, 100 mA (milliamps) of current for 22 hours.