Should rechargeable batteries be left in the charger?As a rule of thumb your battery charger should be a minimum of 10% of the Ah rating of the battery. E.g A 100Ah battery would require a 10 Amp charger as a minimum. To prevent overcharging you should keep the charger size to within 20% of the total capacity. How do you know when rechargeable batteries are dead?The NiCd contains toxic metals and is environmentally unfriendly. Nickel-Metal Hydride (NiMH) — has a higher energy density compared to the NiCd at the expense of reduced cycle life. NiMH contains no toxic metals. How do I choose a rechargeable battery charger?As the electrodes become ever more covered in these materials their ability to be part of the chemical reaction needed to make the battery work degrades. They discharge faster and cannot recharge to the same level that they were able to when new. Which battery charger do I need?One of the most important things you can do to extend battery life is to avoid overcharging. Disconnect chargers and devices with rechargeable batteries after the battery reaches full charge. What is the difference between NiMH and NiCd?Mastervolt Lithium Ion batteries have a lifespan of more than 2000 cycles, which is three times longer than most standard lead-acid batteries. They have an extremely long lifespan due to aspects such as the battery management, very low self-discharge, the lack of memory effect and a discharge of up 20 %. Why do rechargeable batteries stop working?Lithium-ion (or Li-ion) batteries are smaller in size, require low maintenance and are environmentally safer than Nickel-cadmium (also called NiCad, NiCd or Ni-Cd) batteries. While they have similarities, Li-ion and NiCd batteries differ in their chemical composition, environmental impact, applications and costs. How do you extend the life of a rechargeable battery?No, you cannot, you should not for your own safe. NiMh and Lithium batteries have different chemistries, different cell voltages and they require different charging methods/algorithms. Which type of battery has longest life?Just about all rechargeable AA and AAA batteries use NiMH because of its large capacity, and LSD batteries are the best because they hold the charge for longer when your device is not in use. Battery capacity is measured in milliamp hours (mAh). Is NiCad or lithium better?A milliampere hour (mAh) is 1000th of an ampere hour ( Ah ). Both measures are commonly used to describe the energy charge that a battery will hold and how long a device will run before the battery needs recharging. Can I charge a NiMH battery with a lithium ion charger?The Cons of Rechargeable Batteries One of the negatives most often cited by users is that rechargeable batteries often have a lower voltage rating than single use. This can effect a devices output and performance. Another negative is the up-front cost of rechargeable batteries. Battery, Rechargeable Battery & Charger |