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>> Home > Tags > lipo charge

lipo charge
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LiPo batteries by RNinMunich Fleet Admiral!   Posted: 12 days ago
A chaque un a son goût John 😉 I'm not tooo surprised at your NiMh results. But I also think that you are correct that they won't last the proverbial 5 minutes on load. I had a similar experience last year when I retired and took stock of everything lying around in boxes and shelves in the so called workshop😲 Some also measured above the 'dead' voltage but collapsed within seconds of applying a load; a 540 motor running offload. They were consigned to the Great Recycling Centre in the sky 🤔 The NiCads had preceded them by a decade or so! Since then I've restocked with LiPos where I have brushless and LiPo safe ESCs and NiMh for the 'brushed ships with older pre Lixx EScs. For heavier jobs like Graf Spee (3 x 600), HMS Belfast (4! x 385), U25 (2 x 385) I've restocked with 6V 4Ah SLAs. Have started compiling an XL spreadsheet to keep track of them; when last used / charged etc. Oooops! Just discovered that Grauer Burgunder is an excellent cleaner for my inductive mouse pad 😲 Prost allseits! Doug 😎

LiPo batteries by onetenor Fleet Admiral!   Posted: 12 days ago
I don't intend using Lipos when I get back to actually boating and flying as I feel they are too much bother. Lion orABC or similar for me I think.I'll have to think more on it. I have Nimhs and A FEW Nicads .The Nimhs I know for certain are 13 yrs old at least and are showing 11.2v at 82% charge despite not being charged for 4 yrs. The Nicads 9.4v and 42% charge. Not as good; as we might expect but the others really surprised me when I metered them out.8 yrs lying in a blokes planes,boats and boxes and I got them 5 yrs ago.I charged them all and they've not been charged since.We'll have to see what happens under load etc. They might not last 5mins.🤔 John O/T👍 I know some of you won't believe me so tuff. J😎

LiPo batteries by RNinMunich Fleet Admiral!   Posted: 12 days ago
Hi Pete, Do you have a Battery Capacity Checker? Like in the pics? Open circuit voltage is NOT a reliable indication of the battery's charge state😲 As you can see in the pics my two bats, 1 LiPo one NiMh, both show voltages above the nominal value. But the capacity / charge state less than half!! Be warned! Believe I did suggest to you to note the capacities before you left Hungary last time. Whatever - Have Fun😉 Cheers, Doug

Which battery? by Brianaro Sub-Lieutenant   Posted: 19 days ago
Thank you for that, it has helped a lot. I have liPo in another fast boat and do worry about the safety, I keep and charge it in a fire proof bag. I will need weight at the front of the boat so Lead Acid will probably assist. The build is good fun. Thanks again

Which battery? by marlina2 Petty Officer   Posted: 19 days ago
I tend to use LiPo's but they can be temperamental and need the correct charger. They are smaller and lighter than NiMH and give you a much greater output. NiMH are similar in size to LiPo but are heavier and will not have the same sort of power available. Lead acid are the easiest to use in terms of charging but are much heavier and larger then the other 2 types but tend to be cheaper. Lead acid are a good option if you need the ballast or are not limited on physical size. Cost is also a consideration a good quality charger can be an hefty investment but will serve you well and if you buy the correct type will charge/discharge any battery type that you have. I have heard horror stories about LiPo's bursting into flames, which my son did with his RC car. this was down to him not understanding this type of battery. I have not had good results in terms of endurance with NiMh but Lipo's if correctly selected will last much longer, a word of warning here though, they will stop working suddenly with no indication like running slow etc so if using LiPo's you will, need an alarm on each battery. Lead acid is much easier to in terms of Voltage either 6 or 12v with real problems when connecting them in series or parallel for use or charging, a little harder with the other two types but not impossible. This has probably confused you even more but I am sure you will come the correct battery. I have to confess I have an interest in this build as I intend it to be my next project👍

LED Tug Mast Navigation Lights by RNinMunich Fleet Admiral!   Posted: 28 days ago
Hi Pete, since you are in the US try here, the OTHER RS😉:- https://www.radioshack.com/pages/search-results?findify_limi... Personally I prefer stranded wire as it is more flexible and less prone to break if you often have to remove and remake connections, like when you take the cabin off! It's slightly thicker so it's more a question of 'Will it fit?' https://www.radioshack.com/products/22-gauge-hookup-wire-3-p... Some model shops have (or used to!) a really thin stranded wire, as used for tiny 'rice grain' bulbs'. 2nd question: I assume your tug has an 800mAh NiMh battery like mine did. Correct me if I'm wrong, I don't know the new models. I propose to change mine for a 2200mAh NiMh. Can't use LiPo cos the Brushed ESC isn't LiPo safe; i.e. with built in cut off if the battery falls to 3.0V per cell - lowest safe LiPo discharge voltage. 3rd Question - changing motors; I've often wondered that!😲 Up to now I don't see any reason to. Maybe those guys want to enter Towing Competitions!? I don't. Also some folks are just not happy unless they are tinkering and 'improving' 😉 I might try to quieten the gearbox down a bit though 🤔 Teflon grease perhaps!? Cheers, Doug 😎

Longer run time by Haverlock Fleet Admiral!   Posted: 1 month ago
Your question does not have simple answers have you used a watt meter to see the current your motor is drawing at full throttle? With any installation its a good idea to do that test since its a good way to match motor and prop. LiPo batteries have a better current delivery than lead acid BUT you do need to be careful about end voltages so as not to damage the battery. Many ESC have a voltage cut off built in to protect LiPo batteries it may be your hitting that limit with your lead acid battery. The simplest solution to your problem is to look at the Amp/hour rating of your existing battery and get something with a higher rating. Going LiPo can give a much higher rating with a LOT less weight. The downside being the need for a special charger and the need to be careful about storage and end point voltages. As to putting 2 batteries in series to get a higher voltage yes you can BUT increasing the voltage to a brushless motor requires you match the prop to the new voltage running on the existing prop will probably cook the motor. How hot is your brushless running now? Outrunners generally can swing a bigger prop than inrunners.

Longer run time by RNinMunich Fleet Admiral!   Posted: 1 month ago
Hi, Lead acid doesn't like delivering the high currents brushless motors want. They are more suited to long term low currents. Go for a LiPo, 3 or 4S, something 7AH plus should keep you going for a while. Don't put batteries in parallel as one will inevitably try to charge the other, unless you have a hi power diode board in between them to prevent that. Cheers, Doug 😎

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 2 months ago
Thanks Doug, I'll copy that down and pin it to the wall! H, the LiPo in the TX has just 4 gold pads on one end. No way to charge it anywhere else. Martin

Charging NiMhs, one for Doug?... by RNinMunich Fleet Admiral!   Posted: 2 months ago
Hi Martin, No need to get yer knickers in a twist 😲 With the NiMh just stick 'em on your iMax every 2 months and run 'em through a discharge / charge cycle. Otherwise in three months they'll probably be Dodo-like 🤔 NiMh batts lose about 1% charge per day. So, assuming fully charged to start with, they will die in about three months. They should not be discharged below 1.0V per cell or they most likely will not recover and will not take a charge anymore. Your TX LiPo you have no control over so just rely on the charger in the TX. Over winter just switch it on every month or so and check if the red LED lights. If it does stick it on charge until the green LED lights again. Your other LiPo you can give a Storage charge with the iMax. Check it with your Capacity Tester now and again. Storage charge will probably indicate 30 to 50%. If it's less than 30% put it on a Storage charge again. Voltage per cell should never be allowed to go below 3.0V MINIMUM. Start a Battery Diary!! Cheers, Doug 😎 Back to hull sanding for me 😡 P'ing down again today so no outdoor spraying🤔 Just discovered construction fault in my fish cutter😲 First hull planks were set flush with the keel bottom instead of leaving about 1/4" of keel showing 😭 To saw or not to saw ? That is the question!!

Charging NiMhs, one for Doug?... by RNinMunich Fleet Admiral!   Posted: 2 months ago
Mornin' Martin, You don't need to cycle LiPos !!! Play 'silly buggers' with it and you might bugger it! 😡 Just use it normally and charge it when the red lamp appears on the TX front indicating low voltage. Keep an eye on it and unplug the USB charger lead as soon as the LED turns to green. You could also use your Capacity Tester to check the LiPo status, IF it will connect to it. Sounds like it has a very non-standard plug? Pic? The cycling is for NiMH batts to minimise the memory effect. Cheers, Doug 😎 PS Just checked the manual and saw the battery connector! You can forget connecting the battery to any other charger or the Tester 🤔

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 2 months ago
I guess the imax would, Haverlock, but for the fact that the LiPo in the Tx. has it's own built in connectors on the end of the case which connect with four sprung thingies in the Tx.'s battery box, so I suppose it has to be charged in situ, like a 'phone or a screwdriver/drill. I'll have to just play silly buggers with it to cycle it. Martin

Charging NiMhs, one for Doug?... by Haverlock Fleet Admiral!   Posted: 2 months ago
If the charge lead plugs into the transmitter while the LiPO is still connected it probably has the needed electronics to limit the charge. Failing that you can charge the LiPO from your main charger just plug the LiPO lead into the charger balance port

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 2 months ago
Hi Doug, the battery in the new FlySky Tx is a 1s LiPo, so 3.7volts. It's 800 Mah and the set comes with a charge lead from a USB port. But they're 5 Volts, aren't they? So wouldn't that damage it? And they don't cut off when charged do they? Chris's efags are done that way as is her phone and I had a 4 port USB thingy in the glove compartment of me Reliant Fox for Chris's fags and phones. Now I have a neat tower of 6 mains sockets and 4 USB ports and they are down as 5 volts too. I have it to use shorter leads on all my small power tools and to charge stuff. As long as I'm not risking frying a LiPo, I'll be happy! Cheers, Martin

Charging NiMhs, one for Doug?... by Westquay Fleet Admiral!   Posted: 2 months ago
Right, thanks, Doug, I think I get that. I need to get a Tamiya female connector with 4mm plugs on tother end for the nimh packs, although they could be dead too by now. I didn't get a Spektrum combo as I knew I could get a perfectly good Rx. cheap and as ever I have to watch what I spend carefully. I didn't expect Greeno to flog me a dead 'un. So this time I bought FlySky and in order to get it for an amazing 20 quid, it turned out to be one of those pistol jobbies. I don't like the look of them, I must say. I couldn't think of anything worse than buggy racing, BUT that's what comes with a 20 quid spend. I might make a ship's wheel to go on the steering twiddler On the yacht the sails will be going out as the throttle goes forward and in when it's pulled back. Seems logical to me. Thanks for the info on the charger bits, but could you tell me how long to charge the LiPo in the Tx? There's nothing in the instructions about it as it must be a modern upgrade. The leaflet says put in 4 newly charged AAs! Cheers, Martin