A123 Battery Cells For your personal Radio Management Product Airplane

Electric powered product airplanes are all-around for around three decades. A tremendous dilemma  http://www.h-squared.co.uk/     in the early days was battery electrical power density. In other words, they just weighed excessive with the volume of juice you can get out of them. This case has enhanced significantly recently with the advent of Li-Poly cells, but a battery pack for a larger model can certainly charge many hundreds of dollars. The appearance of electrical autos, such as the Toyota Prius has spurred a massive total of analysis into new battery systems. In this post, I will describe an alternate to Li-Poly batteries that offers intriguing options.

A123 Programs produces Lithium-Ion Nanophosphate cells. These cells use a nominal voltage of 3.3 volts and can stand up to constant discharge charges of 30C. They may be securely discharged down to two.0 volts. The voltage remains fairly continual by the discharge cycle, nonetheless they do use a sharp drop-off for the conclude. Expect 300 cycles prior to you detect any reduction in capacity while at 1,000 cycles you can have 75% from the first ability. These are really protected. Overcharging or more than discharging will not likely induce an explosion and can have minimal effect within the lifestyle with the battery. Balancing the cells when they're billed is still an excellent plan, although not definitely needed. They may be charged immediately right after use in fifteen minutes.

The cells are available in two measurements. The original M1 mobile contains a ability of 2.3 Ah and weighs 70 grams (two.forty seven oz). A more recent, lesser sizing can keep one.1 Ah and weighs 40 grams (1.41 oz).

The main supply for A123 M1 cells continues to be DeWalt 36-volt transportable power-tool battery packs. Each and every pack consists of 10cells. I procured two of those for $100 every via Ebay. The costs surface to own absent up not too long ago for the $120-$130 range. Single cells may also be obtained on the web for $15 from the developing variety of vendors. You may come across two in the more compact cells in a Black & Decker VPX battery pack which sells for about $15. The lesser cells may also be had for $12.50 every single.

There are many Li-Poly chargers that support or could be modified to support the charging of such A123 cells. Because with the sharp voltage drop-off when discharged, you are probably better off using a timer when you fly. Otherwise you need your ESC to shut off the motor when 2.0 volts per cell is reached.

Bottom line? These cells give you 70% the electrical power density of Li-Polys for about 45% with the price. For many of us, that is a very good trade-off. They are extremely harmless and will be charged in fifteen minutes. If you conclude up buying half as many battery packs because from the shorter charge time, then they become a much better value.