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Lipo storage, slight swell

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Tony Kenny27/12/2017 15:50:48
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HI Guys,

After reading a note in RCME this month this reminded me that my larger 4S lipos have got a slight bulge and I've been fully charging all my batteries after each use. Often then not using them for many weeks. I hear this is bad.

I'm planning on investing in a charger that has a 'storage charge' facility and a discharge facility. I'll also go for a dual-charger so if I can go flying last-minute, I have a cat-in-hells chance of having time to charge them. DC capabilities will also be useful for charging at the field from the car or a leisure battery. (Don't worry, my car has a 7kW LiPo itself and the engine is more 'generator' than engine so I don't expect a flat). Should I look for anything else?

My favourite at the minute is this: **LINK**

For these slightly bulging batteries, would I be OK just discharging them to a storage level and letting time tell if the bulge gets worse? The alternative is to shell out another £120 on replacing them!

Former Member27/12/2017 16:07:27

[This posting has been removed]

Tony Kenny27/12/2017 16:14:04
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282 forum posts
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Looks good, but it's only a single charger so I can only charge one battery at a time, unless I buy 2.

Martin Harris27/12/2017 16:16:47
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From observation at my club, there seem to have been several "makes" of LiPo that have exhibited a tendency to swell in the last year or two. A pair of Dynamic 3S 2200s that I bought for my Me163 ballooned noticeably after just a couple of months but they continue to perform OK nearly 2 years later.

Tony Kenny27/12/2017 16:27:09
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I think the Overlander RC-D100 looks potentially a good one.

McG 696927/12/2017 16:31:58
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Hi Tony,

You could have a look at the iSDT range of chargers. Available at Banggood or HK.

I have the smaller iSDT Q6 200W from Banggood and it's a great piece of kit.

Storage charge, discharge, IR and the power input is a XT60 so you can use a larger 4S or 6S for charging at the field. If charging multiple Lipos there is an optional 'splitter' plate that makes it possible.

Worth to have a look, I think.

Cheers

Chris

onetenor27/12/2017 17:42:44
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1901 forum posts

Talking of batteries

https://deals.survivalfrog.com/easy-power-rechargeable-batteries-v-of.php?pid=3&product=easy-power-rechargeable-batteries

Steve Colman27/12/2017 17:45:57
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I bought an Ultrapower UP240AC Duo charger from Banggood about 6 months ago and it's been absolutely fantastic!

AC/DC, Internal power supplies, High power output, all the features anyone could want apart from IR monitoring. It was almost 100.00 Euros (about 80.00 quid) but well worth it.

Steve.

Tony Kenny27/12/2017 18:22:57
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282 forum posts
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Posted by Steve Colman on 27/12/2017 17:45:57:

I bought an Ultrapower UP240AC Duo charger from Banggood about 6 months ago and it's been absolutely fantastic!

AC/DC, Internal power supplies, High power output, all the features anyone could want apart from IR monitoring. It was almost 100.00 Euros (about 80.00 quid) but well worth it.

Steve.

Does it have storage charge mode? I found it on banggood, but it doesn't list that as a feature.

Caveman27/12/2017 18:58:38
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Hi Tony, I've got this charger, which is mentioned above:

**LINK**

You can read the manual here:

**LINK**scharger-power-supply.html

It will do all the functions you need.

As far as I'm concerned it's a cracking bit of kit!

Cheers GDB

Steve Colman27/12/2017 19:00:53
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Posted by Tony Kenny on 27/12/2017 18:22:57:
Posted by Steve Colman on 27/12/2017 17:45:57:

I bought an Ultrapower UP240AC Duo charger from Banggood about 6 months ago and it's been absolutely fantastic!

AC/DC, Internal power supplies, High power output, all the features anyone could want apart from IR monitoring. It was almost 100.00 Euros (about 80.00 quid) but well worth it.

Steve.

Does it have storage charge mode? I found it on banggood, but it doesn't list that as a feature.

Hi Tony, Yes it has storage charging mode.

Former Member27/12/2017 19:04:31

[This posting has been removed]

Martin Harris27/12/2017 19:28:57
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9351 forum posts
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Posted by onetenor on 27/12/2017 17:59:28:

Talking of batteries

https://deals.survivalfrog.com/easy-power-rechargeable-batteries-v-of.php?pid=3&product=easy-power-rechargeable-batteries

Handy if you're in the 'States but I suspect that postage and import duties might be a bit of a double whammy.

BTW OT, if your connection is a bit slow, hitting the "Add Posting" button while it's waiting results in multiple postings - which seems to be happening to you a lot lately.

Also, web links are better posted by highlighting some text and then clicking on the fourth button from last on the panel above the text box - which opens a dialogue with a box marked URL - just paste your link (include the http~). Doing this creates a clickable hyperlink.

Tony Kenny27/12/2017 19:44:01
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Posted by Percy Verance on 27/12/2017 19:04:31:

Tony

If you feel you'd probably need to charge pairs of packs regularly, you'll need plenty of ooomph. I'm no expert, but I think somewhere in the order of 2 x 100watt outputs? You'll also need a big leisure battery to complement it for on field charging. My HiTec X2 has twin 400watt outputs, which seem to handle any capacity of pack I connect to them. Not the cheapest around though at £200+

If you need to charge lots of packs with a reasonably quick turn round, you'll struggle to do it on too tight a budget.

Edited By Percy Verance on 27/12/2017 19:08:36

Thank you, good advice, I will replace the connectors, I also prefer not to have to tighten screws before every single flight, even then, there's nothing to say they won't work loose in flight.

Steve Hargreaves - Moderator27/12/2017 19:45:13
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Posted by Martin Harris on 27/12/2017 19:28:57:
Posted by onetenor on 27/12/2017 17:59:28:

Talking of batteries

https://deals.survivalfrog.com/easy-power-rechargeable-batt

BTW OT, if your connection is a bit slow, hitting the "Add Posting" button while it's waiting results in multiple postings - which seems to be happening to you a lot lately.

Good point well made Martin.....wink 2

Extra posts deleted....thumbs up

MattyB27/12/2017 23:16:11
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2073 forum posts
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Without knowing more about the cell counts, capacities and number of packs you intend to charge it is very difficult to recommend a charger an power supply setup. Do you intend to parallel charge? What C rating do you wish to charge at? All important things we need to know.

Even so, nowadays I always recommend a setup that can handle at least 6S and provide a minimum of 300W, and ideally 500W - that give you the absolute to grow into larger models as and when you want to without further investment. A charger to do this can be sourced relatively affordable (look up the Turnigy Reaktors), though don’t get too hung up on having dual outputs as the need for those can be removed if you charge in parallel using a high power setup. Converted server PSUs can provide bulletproof high current delivery for ~£40 and an evening’s soldering work.

Brian Cooper28/12/2017 07:44:19
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555 forum posts
27 photos

I hate to be the purveyor of gloom and doom but from observations done over a few years by myself and others at various different clubs, it seems that the quickest way to kill a Lipo battery is to put it into storage.

Many folk have discovered (to their cost) that after putting their Lipos into "hibernation" for a while, the things don't fully wake up again -- and it makes no difference how much you paid for the battery when new.

If you want to keep them alive, charge them up 100% and keep them charged.

B.C.

Brian Spearing28/12/2017 08:01:21
51 forum posts

Thank you, good advice, I will replace the connectors, I also prefer not to have to tighten screws before every single flight, even then, there's nothing to say they won't work loose in flight.

I’m probably missing something here, but what are the screws?

Tony Kenny28/12/2017 09:32:17
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282 forum posts
62 photos
Posted by Brian Spearing on 28/12/2017 08:01:21:

Thank you, good advice, I will replace the connectors, I also prefer not to have to tighten screws before every single flight, even then, there's nothing to say they won't work loose in flight.

I’m probably missing something here, but what are the screws?

aha! That's me being a prize numtpy and replying on the wrong thread!

Tony Kenny28/12/2017 09:34:47
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282 forum posts
62 photos
Posted by Brian Cooper on 28/12/2017 07:44:19:

I hate to be the purveyor of gloom and doom but from observations done over a few years by myself and others at various different clubs, it seems that the quickest way to kill a Lipo battery is to put it into storage.

Many folk have discovered (to their cost) that after putting their Lipos into "hibernation" for a while, the things don't fully wake up again -- and it makes no difference how much you paid for the battery when new.

If you want to keep them alive, charge them up 100% and keep them charged.

B.C.

Hi Brian, Thank you for the input. I might get a charger that logs data to the PC, label them all and keep half at storage and half at full charge and see how they perform. Not sure how much flying I'll get this year as I'm starting a master's degree in addition to running a business, so might have plenty of opportunity for long gaps between usage.

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