Monday, December 10, 2012

LSD-NiMH Rechargeable Batteries

Low Self Discharge (LSD) are an improved type of NiMH rechargeable battery introduced in 2005 and are the only type of battery I will use. Here's why, given the self discharge rate of conventional NiMH Batteries (let's call them old tech) being unacceptable I've found the following brands will meet my needs. Therefor needing batteries that are ready to go at a moments notice I found on average LSDs will have a longer shelf life as they will retain most of their stored capacity by year end giving approximately 1500 re-charge cycles or more. The 'eneloop' brand are claimed to hold their charge for 5 years with 1,800 cycles. LSD rechargables are also available in Triple-A (AAA) sizes.

According to a battery tutorial from photo tuts+ "Conventional NiMH batteries at the approximate capacity loss of 10% after the first 24hrs and 1% per day after will loose just over ½ of their capacity by month's end." This is why Conventional NiMH rechargeable batteries are unsuitable for powering clocks, TV remotes or any device where it's batteries are expected to last a long time. Conventional (old tech) NiMH rechargeable batteries simply self-drain too fast.

Quote: Low Self Discharge (Wikipedia) NiMH are "a new type of nickel–metal hydride cell (the low self-discharge nickel-metal hydride battery, LSD NiMH) was introduced in 2005 that reduces self-discharge and therefore lengthens shelf life. By using an improved electrode separator and improved positive electrode, manufacturers claim the cells retain 70% to 85% of their capacity after one year when stored at 20 °C (68 °F). These cells are marketed as "hybrid", "ready-to-use" or "pre-charged" rechargeables. Standard NiMH batteries may lose half their charge in the same time period. Retention of charge depends a lot on the battery's impedance or internal resistance (the lower the better), and on the size of the battery as well as the mAh rating. Besides the longer shelf life, they are otherwise similar to traditional NiMH batteries of equivalent capacity and can be charged in typical NiMH chargers"  

Longer storage with LSD rechargables
Longer storage with LSD rechargables
  


Low Self Discharge (LSD) rechargeable batteries
    
Four popular Low Self Discharge (LSD) Rechargeable Batteries
... in order of appearance 


















 

SONY CycleEnergy: AA, NiMH, 2000 mAh
SONY CycleEnergy: AA, NiMH, 2000 mAh
Reference

1 comment:

  1. [Last Chance] Do this to bring any old battery back to life - just like new

    Hi

    I’m not sure if you saw my last email but time is running out on this…

    There’s a new way to bring nearly any type of old battery back to life ...so it’s just like new again.

    This method works with nearly ANY type of battery out there ...and it’s simple and quick.

    But today may be your last chance to learn how to do this simple method…

    >> Click Here To Watch a Presentation that will show you how this is now possible <<

    In the presentation, you’ll learn how to bring car, phone, and laptop batteries back to life.

    This simple methods even works with solar/off-grid, marine, golf cart, and forklift batteries. Plus, many more!

    >> Click here to learn how to bring your batteries back to life again <<

    With this secret method, you won’t have to buy new expensive batteries anymore. You can just recondition your old, used batteries and save money!

    So really …don’t miss out on seeing this. This presentation may have to come down within the next hour.

    >> Watch It Here (while you still can) <<

    Best Regards,
    Kevin Day

    P.S. You learn why Tom can’t teach everyone how to bring their old, dead batteries back to life again in the new presentation. The end of the presentation is pretty shocking too…

    So if you want to learn how to bring nearly ANY dead battery back to life again – then watch the presentation (before Tom has to take it down): >> Click Here To Watch The Presentation <<

    ReplyDelete