Can you replace nicd with nimh in solar lights

Lastly, try replacing the solar light batteries. The most common reason garden solar lights stop working is because the rechargeable batteries inside them have simply worn out. You need rechargeable batteries in your solar lights, as the solar panel converts the sunlight into power to charge the batteries, which in turn powers the light. Not everyone realises there are such things as rechargeable solar light batteries.

Almost all garden solar lights use low capacity rechargeable batteries. More recently, solar lights will use 1. There are different sizes and capacities of 1. The most popular size is AA; these are Full-size AAA is also a popular size at The capacity of your old batteries is usually printed on the batteries in a mAh rating.

You can replace your battery with a slightly different mAh capacity, as long as it is the same voltage; we would recommend choosing your replacement batteries with the nearest possible mAh rating. It is not recommended to replace your batteries with a much higher mAh capacity.

I understand that NiCd batteries do much better than NiMh with temperature extremes. Name required. Mail will not be published required. Juicebar Pocket Solar Charger. This stylish, sleek and reliable pocket size Universal Battery Charger Juicebar Solar Charger is proven to be your best friend in a situation when conventional electric supply is not available or if you are trying to use eco-friendly renewable power supplies.

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Solar light rechargeable batteries are now available on Amazon! Stay illuminated! Looking to replace the AA mAh 1. I have heard that these batteries are not so good for the environment because they contain toxic chemicals see Wikipedia.

I would like to use Ni-MH batteries instead. Would this be recommended or will slowly charging these batteries using solar panels shorten their life span?

Based on this article , it sounds like the NiMH batteries could be safely used with a charging system that is designed to slowly charge NiCad batteries.

The same question was asked in a battery forum, and one of the responses was:. I think the problem with eneloops in solar garden lights is not overcharging but over-discharging.

The capacity is too high for them ever to reach a full charge in a day of sunlight, but at night the lights will run them right down to empty and beyond. NiCd can take deep discharge cycles much better than NiMH can. However, obviously not everybody is in agreement with this. Maybe it depends on the brand?

I don't know who's correct about which is better, however I do know that NiMH batteries quickly deteriorate if left fully discharged.

If you're going to put a solar light containing an NiMH battery into storage, allow it to charge up at least partially first. If you ensure NiCd batteries are correctly disposed of, the potential environmental impact is heavily reduced. NiCd batteries are only bad for the environment if you discard them.

NiCd rechargeable batteries charge quickly and are convenient for areas with limited daylight or seasons with few sunny days. NiMh charges slowly and requires longer exposure to sun rays. Slow charging makes them inconvenient in cloudy conditions or limited daylight. NiCd batteries release a constant charge and therefore the solar bulbs maintain a steady illumination. However, the light switches off randomly after the charge energy in the battery diminishes.

The lamp is likely to switch off unexpectedly. NiMH loses charge exponentially making the bulb change from bright to dim. One can determine the left amount of energy depending on the brightness levels of the solar powered light. NiCd battery is an abbreviation for Nickel-cadmium battery. As per the abbreviation, the main components at the terminals are nickel and Cadmium.

The negative end is also called the cathode and has a nickel-hydroxide deposit. The positive end of the battery also known as the anode terminal, comprises of cadmium-hydroxide deposit. The electrolyte is the paste-like portion found in regular batteries and is composed of potassium hydroxide. NICd battery has a voltage of 1. These batteries discharge at a constant voltage rate and thus, the solar lamp does not dim after continued usage.

Storage of charge in NiCd batteries is due to chemical reactions that charge the chemical properties of the material at the terminals. The reactions are oxidation and reduction reactions which can allow the chemical composition of the materials at the terminals to change and revert back. When charged, the negative terminal has Cadmium, and the positive terminal has nickel-oxy hydroxide NiOOH as the active material.

During the discharge process, the Cadmium deposit at the negative terminal is converted to CD OH 2 and back to Cadmium during charging. The potassium hydroxide electrolyte does not change but allows for the reactions to occur. The Potassium hydroxide provides for the flow of electrons. Electrons flow from the positive terminal to the negative terminal and has a specific gravity of between 1.

Any price and availability information displayed on [relevant Amazon Site s , as applicable] at the time of purchase will apply to the purchase of this product. NiMh is an abbreviation for Nickel-metal hydride. The main components of the Nimh battery are the cathode, anode and electrolyte.

The positive terminal, known as the anode, is composed of hydrogen-absorbing alloys called metal hydrides. The negative terminal or the cathode is formed of nickel hydroxide. Like in NiCd batteries, the electrolyte is potassium hydroxide. NiMh batteries were developed from the scientific discovery that hydrogen can be used as storage of alternative energy.

NiMh batteries evolved from Nickel-Hydrogen batteries that were used in satellites.