Yes! Batteries are not created equal. The technical specifications for a battery, runtime, internal resistance, recharge capacity etc, will vary from one manufacturer to another. As a result, it is best if a battery string is uniform, containing only batteries of one brand. For Automotive batteries - Temperature matters! Heat kills car batteries and cold reduces the available capacity. A brand name doesn't mean anything but the specifications of the battery does matter. Even the same brand name will have varying strengths of the same voltage battery, though made differently to last longer.

In my experience, having purchased numerous types of batteries for home consumption and for use at work, yes, there is a difference. However, I have found that there are fewer consistent differences between individual brands than there are between different battery technologies, e.g., alkaline, lithium-ion (Li-ion), nickel-metal-hydride (NiMH), and others. I have had the unfortunate experience of purchasing batteries from one manufacturer that have clearly not performed as well as those from another manufacturer. However, you have no means of telling which company produces a superior battery in any one format, unless you evaluate them yourself or use a testing service like "Consumer Reports". Selecting the proper battery technology, if you have a choice in the matter, has more of an impact than do variations in quality between manufacturers. There is no point in using a nickel-cadmium (NiCd) battery in a device that usually sees infrequent use and, when it is used, draws high-duration, short-term loads, e.g., an electronic flash for a camera. On the other hand, using a NiCd battery in an electric drill that gets every day use, is a good choice. And some no-name batteries are manufactured by very reputable manufacturers, so you cannot claim that brand A is superior to brand X with any degree of reliability. The discount batteries sold by Ikea, for example, are made by Varta, a long-established company with a good track record.

No, except for the prices!

The main difference is what you are willing to pay for them! I had a PDA of sorts years ago that would tell you how much current and time you had managed to get out of your batteries. Panasonic were the best buy in my opinion, the other top brands did last longer but only by about 5 to 15% and they were nearly twice the price!! The only way to know is to try.

yeah some are not good while others are.

Except Prices