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Questions and Answer



Q1: How to quickly select a suitable battery charger for my Lead-Acid battery?

A: We have nearly 20 standard charger models for general purpose 6V~48V lead-acid battery charging applications.

When you know your battery rating voltage and capacity, you can click following table to select correct chargers:

Table 1: quick select guide for general 6V~48V Lead-Acid/AGM/GEL/VRLA battery charger

Q2 How to quickly select a suitable battery charger for my Li-ion, Li-polymer or LiFePo4 battery pack?

A: We have nearly 30 smart charger models for general purpose 3.6V~48V Li-ion and LiFePO4 battery packs applications.

When you know your battery rating voltage and capacity, you can click following table to select correct chargers:

Table 2: Quick select guide for 3.2V~48V Li-Ion/Li-Polymer/LiFePo4 battery-pack charger

Q3: How to quickly select a suitable battery charger for my NIMH or NICD battery pack?

A: We have 6 smart charger models for general purpose 3.6V~36V(3S~30S) NIMH and NICD battery packs applications.

When you know your battery rating voltage and capacity, you can click following table to select correct chargers:

Table 3: Quick select guide for general 3.6V~36V NiMH & NiCd battery-pack charger

Q4: Different countries have different kinds AC power voltage and plugs, where I can get these informations?

A: Today it is easy to get any useful knowledge for internet. Here I also upload a PDF format file for your ref.

Click here to down load main countries' AC power line voltage and plug type

Q5: What dc terminals or dc plugs for your standard battery chargers can be provided?

A: We have 14 types general purpose dc plugs for our battery chargers. You can give us the plug name (NLA-??) when place

your order. If you want a different dc plug type which is not listed on these 14 types, please consult oue salesman before in time.

Click here to down load 14 general purpose dc plugs photo file.

Q6: Why my VRLA Lead-Acid batteries was thermal runaway (leakage even drum deformation)? How to solve it?

A: In our experience, the mostly reason which caused battery overcharged and thermal runaway is “charger is not terminated just in time when battery nearly full charged and still apply higher voltage (>=14.0V for 12V battery unit)” To solve this thermal runaway issue, two solutions are accepted: The 1st solution is put an external NCT temperature sensor on the surface of battery, when battery get hot charger will cut-off output. The 2nd solution is use a correct timer to limit the high voltage (also called equalizing charge voltage) to a safe range. Solution one (use external temperature sensor) is precise, but need the charger give out and extra temperature sensor cable, this is not always accepted by user because they required modify their terminal connector even need modify their battery housing tooling. Solution two is relative simple and also has a good protection to control overcharge and thermal runaway problem. All of our G100 family models adopt solution two to protect overcharge issue. From year 2009 to now, we have not received any complains about overcharge or thermal runway defects

Q7: How to select the correct charge current for my Li-ion or LiFePo4 battery pack?

A: Generally, for Li-ion and LiFePO4 battery type, recommended charge current should be limited between 0.5C and 0.1C, here "C" is the battery rating capacity. Higher charge current means shorter charge time, but also means more money; lower charge current means long charge time but can save your cost. For example, if your battery type is 4s 12.8V 10Ah LiFePO4 battery-pack, you can use 5.0A charge current (like our G100-12F4 charger), also you can choose 1.0A charge current (such as our P2012-F4, output is 14.6v 1.5A). Using 5.0A charge current to charge an empty 10A LiFePO4 battery will take 3.5 hours, and if charge current is 1.5A then you will take 9 hours to charge this same battery. Obviously, if long charge time is not a problem for you, the economic charger choice should be P2012-F4.