Which type of battery for smartphone is better: Li-Ion or Li-Po?
On the basis of chemistry used for ions carrying electrolyte material, Lithium battery can be classified into Lithium ion and lithium Polymer.Lithium ion battery uses liquid lithium ion as electrolyte while lithium polymer use solid or gelatin like polymers as electrolyte.Lithium ion batteries have high energy density and cost less than lithium polymer. Lithium polymer batteries are light weight and have improved safety . However their cost is high (30% average) as compared to lithium ion. Also the the energy density of Li-Polymer battery compared to Li-Ion Batteries is quite less. Lithium ion batteries tend to lose charge with ageing even when not used, while Li- Polymer batteries retain charge for a longer period even while ageing.This flow chart will clear the doubts:Lithium polymer is more advanced but still have its own pros and cons and Lithium ion may be old but upgrading everyday with technology . so, we cannot say that lithium ion or lithium polymer is best for smartphone battery.Considering the requirements of the smart phone in terms of weight, shape, size, energy density, usage etc , we have to decide, which is best in the case.
How many solar panels do I need to charge a 100Ah battery in 5 hours?
A 12 volt 100 AH battery needs 1200 watts of energy to be charged a 100%. However, its unlikely the battery is at 0% to start with. But for this reply I will assume we need to charge from 0% to 100%.Now a 280 watt panels used for solar rooftop systems will produce close to 280 watts in an hour(in bright sunlight). There's a loss of power because you are likely to have a charge controller between the Solar Panel and your battery. An average power loss is 10%. So you would get about 250 watts of power an hour.So you need 1200 / 250 = 4.8 hours of bright sunlight.A single solar panel of 280 watts will do the work for you. There are other solar panels with various power ratings you can install to charge your batteries such as 100 watts, 150 watts, 235 watts, 250 watts and many more. You just need to calculate the number of solar panels by dividing 1200 watts with power rating of the panels.
What is the maximum capacity of a 18650 battery ?
Just to chime in on this with my own weird experiments.I've patched together a twin t6 led headlight made from cheap as chips trustfure torches.Using the included drivers and some also scarily cheap batteries I got quite good runtimes.The cells are both 3400 trustires and ...9800mah gmt cells (lol) the yellow ones on eBay.Ok, so wiring 4 cells in parallel into one of those driver led combos and letting it run, it would reach approx 5.5-6 hours of usable light, although diminishing rapidly at the end.Also they run limited I think to about 80% of the max. And produce less heat (nowhere near the claimed lumen output on the torches or near the heat output of my old XML setup.Claimed ed lumens was stupid but they do seem to give off about 7-800lm if memory serves as a comparison to what I'm looking at.The battery calculators say it should only run for a couple of hours max at full blast.