Review on PKCELL LR1 Alkaline Battery 1.5V N E90 - Long Lasting, All-Purpose Battery for Household & Business (20 Counts) by Domonique Rieder

My son needs these batteries for his Cozmo robot to power the blocks the robot builds. If you know this toy, you know exactly what I'm talking about. Each block requires one of these batteries and you don't even think about replacing them until one day the block just stops glowing and then realize they're not AA, AAA or even 9V batteries, so run to the Shop to see who's wearing them. Fortunately, N batteries are gradually becoming more common, but not very common yet. If you find them, you'll be honored to pay $4-5 for a generous two-battery pack. This pack of 20N batteries was perfect for my son's robot. We changed the batteries in all his devices and he has been playing with it for a month now. I've seen studies comparing batteries from other manufacturers to well-known brands and in many cases they matched and sometimes exceeded the battery life of those brands. So don't blindly spend money just because of the "E" or "D" in the name, especially if you need these types of batteries. Try her.