I was shopping for Energizer Lithium AA cells at target the other day and noticed that they have some new offerings. I could not find much information on them here at CPF or on the web so I got some to test.
The Energizer Ultimate seem to be the new Premium Lithium cells and are branded with a claim of lasting 8X longer than the Energizer MAX Alkaline cells in a digital camera? I guess this is a step up from the last version of the Lithium AA which was touted as 7X. Whether this is a marketing scheme, they actually managed to cram in more power, or the MAX Alkaline cells decreased in power has yet to be determined. The Ultimate cells had an expiration date of 2023, so these must be rated for a 15 year shelf life. (edit shelf life)
The other new player is a lower priced Lithium cell called the Energizer Advanced which claims to last 4X longer than the Energizer MAX Alkaline cell in a digital camera. They have the same temperature ratings as the Ultimate cells -40 to +140 deg F. The Advanced cells had an expiration date of 2018, So these must be rated for a 10 year shelf life. (Edited because I can't subtract)
The Ultimate cells were $9 something per 4 pack of AA and the Advanced were $6 something per 4 pack of AA. I wanted to see how they compared because I use Lithiumís in a Canon A570is digital camera that I fly on a weather balloon that can reach 100k feet which is very near space and temperatures can get below -40F so the temperature rating was important to me. Here is a picture from my last flight.
I ran the 8X Ultimate and the 4X Advanced through my CBA-II with a .5A constant discharge and the results are closer than I was expecting.
Red = Ultimate Lithium 8X cell, Black = Advanced Lithium 4X cell
At roughly 2/3 the price of the Ultimate cells the Advanced look to be a good option for some situations. I will be flying them on my next balloon flight in a few weeks.
I hope this information is useful to someone.