They will also usually offer individual channel charging, because a microprocessor controls charging to each individual battery. Because intelligent chargers have automatic shut-off, this allows them to have a higher power output so providing faster charging than a manual charger, depending on the capacity and size of the battery. The benefits of an intelligent charger are that the correct amount of charge is delivered so there will be no over or under recharging. This achieved by incorporating a computer chip or microprocessor into the charger which controls the various aspect of charging, and can usually also detect faulty batteries. ![]() When the battery is fully charged this will be indicated on the LCD display and the charger will stop charging or revert to a trickle charge to keep the battery topped up. RETURN TO TOP What is an intelligent charger?Īlso known as ‘Smart’ chargers, this type of charger usually has an LCD display which will indicate the level of charge in the battery – for example if it is half charged, fully charged etc. These chargers usually require the batteries to be inserted in pairs to complete the circuit and recharge the batteries. This may mean the batteries are under charged, or left on charge longer than necessary leading to an element of guess work with the charging times - particularly if your battery is not fully discharged (flat) when being recharged. The disadvantages are that you won’t know exactly when your batteries are fully charged. They are usually at the lower end of the price range and if you do not need a fast charger they can be a good compromise. The main benefit of this type of charger is value for money. These chargers deliver a slow, steady charge and can often be advertised as ‘overnight’ chargers. Usually these chargers have an LED indicator (such as a light) to show the batteries are receiving charge, however these indicators will not change when the battery is fully charged so you will need to calculate the time required by dividing the capacity of the battery with the output of the charger – please see our FAQ on charging times for further details. Typical charge current for AA batteries should be around 120 – 150mA to avoid any over-charging when left on for a period of time. ![]() Trouble-shooting tips for battery charging What is a manual charger?Ī manual battery charger will recharge NiMH batteries continuously and will not shut off when the batteries are fully charged. Is my charger suitable for world-wide use? How long will it take to charge my batteries?ĭo I need to use my rechargeable battery until it is flat before I can recharge it?ĭo I need to use the same brand rechargeable battery as my charger?Ĭan I charge my single-use batteries in my charger? ![]() What type and size of batteries can be recharged?ĭo stay-charged or low discharge batteries need a special charger? There are many different types of battery chargers and they can be categorised in a variety of ways - firstly how they indicate when a battery is charged which can be divided into two types - Manual or ‘Dumb’ chargers and intelligent chargers. This guide is for NiMH rechargeable battery chargers.
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