Well, do Duracell actually last longer? I need to replace some AAA batteries in a difficult to reach spot, so the longer they last the better! Advice please 
Panasonic Eneloop rechargeable. Iām afraid itās the final answer.
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Yes, thereās nothing like Eneloop and never has been. Strange that no one has matched them for 19 years or so.
Although I do use lithium aa/aaa sometimes in things I want to last for a long time or outside cold temps.
Iāve tried eneloops in the bicycle lighting and that was no success during winter indeed.
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Iām talking standard AAA batteries here, not rechargeable.
Probably Duracell thatās what I use.
I canāt imagine rechargeable being any use if they are in a difficult to reach spot. 
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Doesnāt it depend on the load? I seem to remember Duracell are for high loads short time periods. āStandardā batteries are for low loads long term use.
Depending what is being powered, rechargeable boes not always work as well as dry cell, the 1.2v vs 1.5v output can be significant, and total capacity of dry cells may be higher.
With dry cells (actually any vatteries), best depends on whether low or high current, continuous or intermittent. Some brands publish their energy capacity (milliamp hours or amp hours), but properly to compare, and to assess for best for your use, you need also to look at the discharge rate at which they are rated. Sometimes you will find batteries that have published data for more than one discharge rate, enabling a well informed choice. As it is a while since I had any critical demand I donāt remember for which brands m the information was available which notā¦
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Theyāre for a āsmartā (?) thermostat - takes 4 AAA batteries. Standard (cheap supermarket brand) last about 9 months (& always run out on the worst cold day occasions!)
Duracell in mine. 
Donāt use anything else
Freebies and cheapies with products get recycled.
Not worth any chance of leak or corrosion. 
Check occasionally but Iād rather alkaline than Lithium knowing about thermal runaway. 
Energizer Ultimate Lithium is my go to brand.
They are claimed to be āworldās longest lastingā, take it with a pinch of whatever, but they for sure last longer than standard alkalines.
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Duracells do last but they have a fault which is that they can leak badly when the state of charge gets low. So using them in an awkward place that canāt be easily monitored may not be the best use.
My preference is Energizer over Duracell. Energizer seems to last longer for me.
Just had a look at the Philip Harris Scientific website. (they supply scientific equipment to industry and universities etc).
They seem to use GP ultra. Never bought them, but I have seen them before.
If a reputable scientific equipment supplier is using them, Iād assume they are a good battery.
Tool Station sell them, 4 for Ā£3.89.
GP Battery Guide
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Energizer Ultimate lithium
Use them in everything from cat flap to remotes.
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Okay - going with the Energizer.
Thanks for all the advice
Radioshack Value. Brilliant battery, will keep a mini LED going for many many minutes!
Energizer are the best brand. Duracell are trash.
Energizer lithium are in their own league, but at a price. Even compared to Energizer Max (their best alkaline), lithium is 3 times the cost, so will probably not be worth it. I use lithium in clocks, outside watering timer and smoke alarms (nest) where I donāt want to have to think about changing them for ages. Remotes and all other things, I use Eneloop. I have over 40 Eneloop aa, so never short.
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My clocks use lead and cast iron
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I find if I put energizer batteries in my remote it provides uber bass extension and increased clarity across the midrange.
Not as good as the Chord Music batteries though; triple sublime. They only last 5 mins of awesomeness though so probably not the answer for you.
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