Forum Discussion
- That's why I am stubborn about the Lifeline.
When I did cycle life testing "According to Mex" I discharged the batteries to 3.0 volts @ a 10% total amp hour rate. This discoupled the load banks and enabled constant voltage charge of 14.8 volts which was left on for 24-hours. Energy transactions were recorded. Few battery brands made 50 cycles. Never bring a cat to a dog fight. The Delco Voyager called it quits after six cycles. All six of them. The Trojans and Picos lasted until high thirties early forties. Globe Union batteries did well. Group 24 BCI. A heart stress test is not done by having a patient relax in a Laz Z Boy and exercise a TV remote control. Unfortunately back then the RV car jars had 5% antimony and RV charging system voltage was too high.? - There seems to be a new headline about a new emerging battery technology about every 2 weeks.
I'll believe none of them until they can actually make inroads into the electrical storage market, viably.
Until then, these headlines are designed to cause increased Advertising revenue and nothing else, in my opinion.
By all means keep up the research, but the Media's hyping the newest latest and greatest distant hope is based solely on generating revenue. - So long as the aluminum batteries can be charged at low temperatures I'll be quite interested.
Fascinating that they can be rapid charged--a cell phone in one minute. - I guess "density" would mean mass to a mechanical engineer and energy density to an electronics engineer, at least in the context of a battery?
Curiously, I looked it up - lead and aluminum are about equal, as far as buying it on the stock market - $0.8 to $1 per pound over the last year. I always thought aluminum to be a far more valuable metal.
Maybe these batteries will have merit if the retail costs are similar to AGM or SLA per mass-unit and per energy-unit (whatever they may be :)
DEKA - East Penn rates the AGM batteries I bought at a huge number of cycles as well, using 1 cycle = 10% or less discharge with immediate recharge. Personally, my definition of a cycle is 50%-80% discharge, with 6-12 hours elapsed before a recharge. - To me density means pounds, or to get technical slugs (Mass not pounds) and if that is the case Aluminum batteries I would excpet to b physically larger.
Still.... That is a LOT of cycles.
I also double checked Energy Density
Lead Acid is roughly half Li-On (Source Wikipedia)
And the Stanford cell is 20-40% of LiOn.
This is watts or units-energy per kilogram (or Slug if you like). - that'll never fly. same density as lead acid means same size per amp-hour. maybe it'll be useful if they can increase the density to match at least nickle batteries. lead is a lot cheaper than aluminum, and most applications using lead batteries wouldn't pay the higher cost for weight savings alone.
