Hey guys,
Ok ,so it was suggested that I participate in the knowledge base instead of just taking from it....here goes. (NOTE)all info comes from YT. Joshua bardwell, mr steele, drone camp...etc
Lipo batteries have a life span.
Once fully charged ,they should only be discharged to the voltage number on the pack.
Example : 4s= 14.8 volts when fully charged it should be 16.80 volts..so you can burn or use 2 volts out of the battery and then land.
15 volts and land,is a safe number.
Discharging 4s lipos below 14.5 volts will harm batteries.
Damage is reflected in shorter flight time,higher heat after use,swelling,(stop using). Lower punch value.
Batteries can be charged and let sit for a day or 2 at the MOST. STORING FULLY CHARGED LIPOS for longer than 2 days is a fire hazard and will deteriorate the chemical exchange of ion energy thus reducing punch and discharge rates. A battery that has 15 volts left in it after use is an ok storage voltage.
C RATING= The batteries ability to give energy to your quad.
So a 30C battery will give less energy away at one time than a 75C battery.
THE TRADE OFF= Higher c rating in general will provide more power (punch) acceleration for LESS time than a lower c rating. A lowere c rating battery will provide a little more run time. But not a lot. The average c rated battery for our hobby is about 50 c.. that's an AVERAGE.
MILLIAMPERES or ma. This is a measurement that the manufacturer puts on the battery to tell us what the capacity or how much energy the battery can store...most quad racers and freestyles are using a 1300ma to 1500ma battery .
WEIGHT= The (dead weight ) of your energy source is a real part of the quads abilities in the air. Although it might not be discernible to our hands , the weight difference between a 4s 1300ma and a 4s1800ma battery the quad's performance and agility is aware. There has to be a balance between the weight of the battery and its energy storage and discharge rate. TRADE= more cells more power less agility example 4s vs.5s the 5s has more storage ability obviously ,however its additional cell weight does not justify the additional energy.
GRAPHINE BATTERIES= Altough this technology is very new,the graphine batteries are a little lighter than the standard lipos out there. They generally cost more as well. However their discharge rates are very consistent where as lipos can be inconstant with each charge. The graphine batteries also do not heat up like regular lipos which adds to their life span.
HEAT= The more heat is generated by a batteries discharge action the more internal resistance the battery has . Internal
Resistance is generally the batteries willingness to give the energy away. MORE HEAT LESS WILLINGNESS. If a batteries after flight internal temperature rises above 125 degrees at any time it is destroying itself and WILL puff.
CHARGING= The batteries SAFE charge rate is as follows ...
EXAMPLE. 2200ma battery= 2.2amp charge rate
1800ma battery= 1.8 amp charge rate
1500ma battery= 1.5 amp charge rate
1300ma battery= 1.3 amp charge rate
MAX CHARGE RATE( NOT RECOMMENDED)
Depends on manufacturer,quality of battery.
COST= there is a correlation between the cost of a battery and its longevity. There is also a correlation between the batteries internal make up and its ability to deliver consistently what the numbers on the front of the battery says.
CONCLUSION= Check to see what the experts are flying and why. Then buy those. These guys make a very good living off of what they use to fly...and it seems that they CARE about their choices..NOT WINNING. Money stops.
As always
Peace and progress
Keith
