Everything about The Low Self-discharge Nimh Battery totally explained
The
low self-discharge NiMH battery (
LSD NiMH) was introduced in November
2005. It reduces self-discharge and, therefore, lengthens shelf life compared to normal
NiMH batteries. By using a new separator, manufacturers claim the batteries retain 70 to 85% of their capacity after one year when stored at 20 °C (68 °F). These cells are marketed as "ready-to-use" or "pre-charged" rechargeables. Aside from the longer shelf life, they're otherwise similar to normal NiMH batteries of equivalent capacity and can be charged in typical NiMH chargers. Low self-discharge NiMH batteries are good for photography and other high energy requirement applications. Due to the low self-discharge, they're also suitable for long-term intermittent or low-current uses; they might last up to a year between charges, much better than ordinary NiMH batteries. They can therefore also be used for electrical
clocks,
remote controls, etc.
Charge retention
It is generally claimed that the batteries retain 90% of their charge after six months, 85% after a year and 70% after two years, when stored at 20 °C (68 °F).
Brand names
This new type of batteries is marketed with over a dozen different brand names, but only actually made by three companies – (
Sanyo,
Gold Peak and
Yuasa).
Sorted by
manufacturer and the product name:
- AccuPower AccuLoop
- Alcava All in One
- Ansmann maxE
- Conrad Electronic Endurance
- Duracell ActiveCharge
- Duracell Pre-charged
- Gold Peak ReCyko
- Hähnel Synergy
- Kodak Pre Charged
- Maha Powerex Imedion
- Nexcell EnergyON
- Panasonic INFINIUM
- Panasonic R2
- Radio Shack Precharged
- Rayovac Hybrid
- Sanyo Eneloop
- SBS BiReady
- SKB ready2use
- Sony CycleEnergy (manufactured by Sanyo)
- Sunmol AnyEnow
- SWISSBATTERIES accubattery
- Titanium Enduro
- Uniross Hybrio
- VARTA Consumer Batteries Ready2Use
- Vapextech Instant
Sanyo Eneloop
Sanyo's Eneloop batteries are one brand of low self-discharge NiMH battery.
A Sanyo official has stated:
"The Eneloop batteries are sold charged, but not necessarily 100% fully charged. In Europe we charge them about 75%."
"Several long term tests have shown that the self-discharge rate decreases over time. This means that Eneloop batteries discharge relatively fast at the beginning and relatively slower the longer you store them."
"Higher temperatures substantially increase self-discharging. It is best to store Eneloops as cool as possible to keep the charge in the battery. As a rule-of-thumb, every 10 °C increase in storage temperature is equivalent to doubling the discharge rate."
"The chemical decomposition of the cathode has been reduced substantially by the use of a new super lattice alloy."
Price
Low self-discharge NiMH batteries are typically moderately more expensive than ordinary NiMH batteries and are sold in sets of 2 or 4 AA or AAA, with or without a charger. They are fully compatible with ordinary NiMH chargers.
Further Information
Get more info on 'Low Self-discharge Nimh Battery'.
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