Rated 4.6 out of 5 by 213reviewers.
Rated 5 out of 5 by RoeThePerfect Tested in a Shure Wireless KSM9 My First impression was the weight it weighs nothing,them I tested with a shure Ksm9 for 2 - 3 hours daily. I lost count of how many hours worked !!A musician has a 4 AA battery guitar effect pedal it ran out of battery and I gave him the energizer U. lithium, two months later he said me he still had them so I asked him how much lasted a normal battery?He responded: two days of show. 02/26/2013
Rated 3 out of 5 by AndySoda 2 out of 6 Wands for my Motorized Shades Died I recently had to replace the battery wands for my motorized blinds which have been working without issue for 2 years, some wands are still working - but on the windows that are opened and closed the most - they needed to be replaced.The manufacturer switched from closed wands to ones that open up and you can put AA batteries in them - they sent me 6 new wands and 48 Energizer Ultimate Lithium batteries - 8 for each wand - and they were expensive!I used them for a few months and then two wands died and the blinds won't go up or down, versus the old ones that worked for 2 years! I hope the other ones last.Can I recharge these batteries? 02/13/2013
Rated 5 out of 5 by MercatorComercialis Amazing product... except for the price. Bought both AA and AAA Ultimate Lithium batteries from Energizer - my first purchase from this manufacturer, ever. I really have to tell you: these batteries are absolutely extraordinary! Extremely long shelve life (mine - made in Singapore - will expire around 2026 (!!!) - if I'm still alive - otherwise these batteries will outlive me!), absurdly light weight (in fact, these are the lightest AA and AAA batteries I've ever seen), very good-looking (love the chrome 'n' blue graphic design style) and very stable (thermally and mechanically). The only thing that makes me sad, is for the fact that not all torches/flashlights out there are 'lithium battery compatible'. Indeed, my also extraordinary Fenix LD01 flashlight, states that 'lithium batteries are not recommended' and that I should stick to alkaline or rechargeable batteries which are FAR heavier than the Ultimate Lithium (buy one of each, weight them on your hands and you'll see what I mean...) - and I really regret this, since these batteries are so much lighter and long-lasting than any alkaline/rechargeable combo out there. Perfect for EDC or critical/survival gear - if these can accept lithium batteries, that is. On the other hand, price is steep and one should think through before buying, but for survival gear you really don't want to compromise your life on it. The absolutely best batteries from Energizer, in my opinion, and the brand's best technical achievement so far. Well done, Energizer. Well done. 02/04/2013
Rated 5 out of 5 by seano231 Very execellent product, they lasted longer than most These batteries lasted longer than any other battery we have tried 01/26/2013