k30dxedle Posted July 16, 2011 Report Share Posted July 16, 2011 Ok, great. Thanks! Thanks to infected and all the other contributors to this thread as well; very helpful. Link to post Share on other sites
infected Posted July 18, 2011 Author Report Share Posted July 18, 2011 Great find on that pack. I had heard they had such a style, but hadn't seen it on their website. Link to post Share on other sites
bellyisking Posted September 26, 2011 Report Share Posted September 26, 2011 i'm new to this stuff too, and i already hate it. I got a pro peak sigma 2 eq charger, i got 2 batteries i want to store for an up and coming game. so when i go to use the storage option on the charger what amp & volt should i set in the storeage mode? the setting vary, amp vary from 0.1 - 1 and well the volts 7.4 / 11.1 etc the batteries are 7.4v, 1100mah, 15c. Link to post Share on other sites
LordElpus Posted September 26, 2011 Report Share Posted September 26, 2011 what are you tryign to achieve? Link to post Share on other sites
bellyisking Posted September 26, 2011 Report Share Posted September 26, 2011 About a 50-60% charge so i can come back in week and use it. also sorry about the last post, long day at work... Link to post Share on other sites
infected Posted September 26, 2011 Author Report Share Posted September 26, 2011 Unless you're not going to use the battery for 6-8 months, there is no reason to worry about having it at a "storage" charge level. Link to post Share on other sites
Triggerhappychappy Posted September 27, 2011 Report Share Posted September 27, 2011 About a 50-60% charge so i can come back in week and use it. Unless you're not going to use the battery for 6-8 months, there is no reason to worry about having it at a "storage" charge level. DEAD WRONG. Lipos should not be left fully charged for more than a few days, a week at most- any longer and the anode & cathode will start to corrode due to the high voltage level within the cells, leading to poorer performance and higher operating temps, along with reduced capacity over a shorter length of time. You don't need to enter any special settings when using storage mode, just set the charge current and cell count/ voltage exactly the same as normal; the charger will terminate the charge automatically once the voltage in each cell reaches the storage level ( ~3.85v usually )- no further input is required from the user provided you have connected the lipo to the charger correctly (main power leads + smaller balancer connector lead ). Link to post Share on other sites
infected Posted September 27, 2011 Author Report Share Posted September 27, 2011 Okay, 6-8 months might have been a stretch, but if you're using it more often than once a week per month, you're fine. If stored at full charge at room temp for a year, you'll lose up to 20% capacity. That's assuming a full charge, and then 12 months of no use. That would mean about 1.6% drop in capacity per month assuming a linear drop (it's not linear but close enough). BUT this user is looking to go back to using it within a week. Assuming (and yes I know it may not be true), that this user is going to be charging likely at least 1 time per month if he's playing every few weeks, then he's fine not doing a storage charge. I will agree, my 6-8month statement was a bit generous, but we're looking at about 1.6% loss over the course of a month if left at a full charge. The loss is actually less when the battery's been used for a game (not drained), and left alone till the next game, than it would be if it were left at full charge. I can see this affecting RC guys who demand much more out of the battery pack than airsoft does needing to be more agressive in battery maintanience, but for bellyisking ... he'll be fine. Link to post Share on other sites
jal3 Posted September 28, 2011 Report Share Posted September 28, 2011 LiPo's are too cheap to care about that imho. However, it's better to keep them charged than discharged, so recharge after you come home if you've emptied the battery. Link to post Share on other sites
infected Posted September 28, 2011 Author Report Share Posted September 28, 2011 I totally agree. That's why I don't bother with a storage charge unless I know I won't use the battery for months. Link to post Share on other sites
Genome Posted October 18, 2011 Report Share Posted October 18, 2011 Question, I just placed an order on a 7.4v 1200mah 20c lipo. Would this be enough to run a open game of about 7-8 hours? If not, how long can I expect because I am debating if i need to buy another pack. Link to post Share on other sites
harborne blue Posted October 18, 2011 Report Share Posted October 18, 2011 Question, I just placed an order on a 7.4v 1200mah 20c lipo. Would this be enough to run a open game of about 7-8 hours? If not, how long can I expect because I am debating if i need to buy another pack. It depends on how much you shoot and whether it's on FA or SA. I have the same batteries running in my M4s and I use two - one for the morning, one for the afternoon. I've only had one fail me, after a very heavy afternoon. If you're sniping or playing MilSim, it should last but I'd recommend two. Link to post Share on other sites
Genome Posted October 18, 2011 Report Share Posted October 18, 2011 Alright thanks! I figure perhaps two would be needed. Anyone else want to chime in? The more experience the better. Link to post Share on other sites
infected Posted October 19, 2011 Author Report Share Posted October 19, 2011 Genome, what's the parts list for your gun? Trying to figure out the possible load on the system will help determine the run time of the battery. Link to post Share on other sites
Genome Posted October 20, 2011 Report Share Posted October 20, 2011 Let's see here... Motor: G&P motor Gears: Stock G&P gears Piston: SHS polycarb not are all steel teeth. with a guarder piston head. Corrected AOE Anything else? Link to post Share on other sites
Kenworth W900 Posted November 26, 2011 Report Share Posted November 26, 2011 I have a couple of quick questions if I may: 1. Does anyone here have experience with the Turnigy Quad (4x port) Smart Chargers? EDIT: Link -> http://www.component-shop.co.uk/html/tq4.html 2. If the Lipo charger is requesting a value for 'A' (amps) and a value for 'V' (volts) - where should I find these values? Sorry to sound like a complete noob - its probably because I am (with regards to Lipos anyhow). Link to post Share on other sites
LordElpus Posted November 26, 2011 Report Share Posted November 26, 2011 Volts would be what the battery is, Amps is down to the battery being charged and what rate it's safe to charge it at. Most cases you can charge a lipo at 2C (or 2 times it's mAh rating). Some like the Turnigy NANO packs can be charged at 5 to 10C. If you are charging a 1000mAh battery at 2C you would set the charger to charge at 2 amps. If it was 1500mAh you'd charge at 3 amps. Link to post Share on other sites
Kenworth W900 Posted November 26, 2011 Report Share Posted November 26, 2011 So, for my 11.1V 3200mAh Lipo: 3200 x 2 = 7200mA = 7.2 A 11.1V = 11.1V Right?? Link to post Share on other sites
LordElpus Posted November 26, 2011 Report Share Posted November 26, 2011 however you won't find many chargers that have a big enough power source to supply that much oopmh. 4A is normally the most you can get out of charger psus. Link to post Share on other sites
Kenworth W900 Posted November 26, 2011 Report Share Posted November 26, 2011 Many thanks mate So for my large 3600 and 3200 Lipo's I'll be charging at my highest rating - which I believe is 5A. Link to post Share on other sites
White_Rabbit Posted November 26, 2011 Report Share Posted November 26, 2011 just picked up a systema and its fitted with mini deans, im struggling to find anywhere I know of in the UK that sells a charger that comes with a mini deans lead, anyone know of one that does ? Link to post Share on other sites
LordElpus Posted November 27, 2011 Report Share Posted November 27, 2011 nope, make a adaptor lead or buy a charger that charges via the balance tap (warning, these chargers are god awfully slow) Link to post Share on other sites
EscapeArtist Posted December 5, 2011 Report Share Posted December 5, 2011 I have a random question that I hope someone on here can answer... I just bought a "Hot Power 7.4v 1700mah lithium battery" from ehobbyasia.com and the pack is labeled "High Rate li-poly LiFePO4" so I have no idea whether to charge it as a LiFEPO4 or LiPO battery, and I really don't what it to blow up... is it going to do so if I don't charge it properly? My charger is a Tenergy Balance charger which requires me to choose whether a cell is LiFe or LiPo. http://shop.ehobbyasia.com/hot-power-7-4v-1700mah-15c-lithium-battery-for-ak-series.html Link to post Share on other sites
LordElpus Posted December 6, 2011 Report Share Posted December 6, 2011 hard one, because i wasn't aware that you could get 7.4v LiFeP04 packs as they have a different cell voltage to LiPO/LiION Link to post Share on other sites
infected Posted December 6, 2011 Author Report Share Posted December 6, 2011 It looks like a LiIOn given the cylindrical shape and voltage. Another reason to go with reputable brand battery... you know what you're getting. Li-ion and lipoly aren't always the same, given that the Li-ion batteries (like you see in laptops), have a lower discharge rate, but are high density. The Lipos we use for airsoft have a higher discharge rate. I saw a similar battery in a customer's gun once, and it didn't last long. I don't recall the brand or battery type (other than a lithium type), but it didn't last him more than a couple months. Link to post Share on other sites
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