Fruit Battery Light Diode Science Kit Orange Potato Lemon Battery Physics Teaching Experiment

This kit: the metal sheets in this kit are thin, but they generated power better than other kits I tried. Also the alligator clips are better than the non clip wires in other kits.Potato battery notesFirst off, if your kid is going to do a potato battery science project know that this is harder than it looks. The LED lights typically require 3 volts and about 20 mA to light them up. sometimes you will get lucky with fewer milliamps, but most require 20 mA. This requires more potatoes and more wires than you might expect. Obviously, results may vary, but don't expect this to work with 1 or 2 potatoes. It took about 12 potatoes (4 in series, 3 in parallel) for my kid's project. Expect it to take at least 4 potatoes. Most of these kits don't have enough wires to connect all the needed potatoes (if you use 12 potatoes as we did). I ordered two different kits, and then later 3 more of a third kit type before we finally succeeded.Also, the larger the surface area of the zinc/copper, the more power output you will get. The rectangular metal pieces seemed to have better electrical properties than the spike-shaped ones. I think they must have increased surface area.Powering a small siren/noise maker or a clock (included in some kits) uses much less power than the LED light. A small non-LED Christmas light takes about 100 mA for full brightness.Warning: The clocks in the kits are very delicate and the wires break very easily.Wires with alligator clips are better than wires without clips.One of the kits we used came with a single LEDS that flashes multiple colors. each color using a different amount of current (mA). This was pretty cool. It required about 6 to 20 mA to light up. I used my multimeter with a store-bought battery to determine how much current (mA) each load (LED light, fan, clock) used.Pro tip: boiling a potato for 8 minutes increases the power output (credit goes to Israeli Researchers)Also: You cannot charge a phone or light a large bulb from a battery. Those are hoax videos going around the internet.

Very happy with this kit, I bought 2 to help my son with his 5th grade project. I think a few of the bulbs were not working, but there are a few in the kit, so all worked out OK.

I bought this kit to do an energy experiment with my class.There were no directions with the actual kit. I had to search them on Amazon in order to find how to connect everything. I followed all of the directions that were printed on Amazon. The experiment did not work. The LED bulb did not light up. I kept trying again and again with all of the different pieces double checking, that I had them all connected correctly, and nothing worked. Additionally, as I was on the clipping, all of the pieces to put them back in the bag one of the alligator clamps, completely disintegrated, and fell apart. I am assuming that the poor manner that this item was constructed in, is why I did not work. I do not recommend ordering. This is a waste of time and money.

The larger metal shims worked better than other kits , but the lights are almost impossible to tell when they go on. The kids could not see the circuit had been completed unless we put a shade around it to see when it dimly lit.

We purchased four of these kits to test lemons, potatoes, cucumbers and strawberries. It worked well although I did have to help my son with cutting slits and connecting the wires. (It's really hard to open the clips which is why I gave it 4 stars.)

This kit actually works! It did not come with directions but was much easier to use than another kit from Amazon.

Only 1 LED sent, suppose to have 3

Excellent product, service and quality for such low and satisfying price.