Dead LiPo's - recommend replacements?

[Gruntfuggly 553]

Hi all - long time no post. Started digging out the RC gear from the shed today and thought I'd get it up and running again. My two old Turnigy LiPo packs don't seem to want to charge. Can anybody recommend replacements? I'm not sure if the old ones are actually dead - the monitor seems to think they are OK, but I think the charging cables (JST?) have got corrosion in the plugs or something. Is it worth replacing the charging cables?

The old packs are 135x45x20 mm which means they fit the Blitzer chassis tub perfectly, but I can't seem to find any that are less than 25mm thick.

[simalarion 2151]

[Willy iine 17949]

If the LiPo have not bulged, chances are they are still good.  I would first try salvaging those packs by using a different connector.

I have LiPo last charged 2018 that are still steadily holding storage charge..  I don't expect them to go bad any time soon.  I check them every 3 months.

[Gruntfuggly 553]

They're in hard cases, but there is no sign of swelling. Thanks, I'll try swapping the cables.

[twaleta 134]

2 hours ago, Gruntfuggly said:

Hi all - long time no post. Started digging out the RC gear from the shed today and thought I'd get it up and running again. My two old Turnigy LiPo packs don't seem to want to charge. Can anybody recommend replacements? I'm not sure if the old ones are actually dead - the monitor seems to think they are OK, but I think the charging cables (JST?) have got corrosion in the plugs or something. Is it worth replacing the charging cables?

The old packs are 135x45x20 mm which means they fit the Blitzer chassis tub perfectly, but I can't seem to find any that are less than 25mm thick

Ive heard the best batteries are either gens ace or hrb.They seem a good price to 

[Grumpy pants 4243]

16 hours ago, Gruntfuggly said:

Hi all - long time no post. Started digging out the RC gear from the shed today and thought I'd get it up and running again. My two old Turnigy LiPo packs don't seem to want to charge. Can anybody recommend replacements? I'm not sure if the old ones are actually dead - the monitor seems to think they are OK, but I think the charging cables (JST?) have got corrosion in the plugs or something. Is it worth replacing the charging cables?

The old packs are 135x45x20 mm which means they fit the Blitzer chassis tub perfectly, but I can't seem to find any that are less than 25mm thick.

Welcome back 🥳

I have a pair of new LiPo’s never used, purchased Nov ‘20 🤦

Looks like you have sourced the answers to my next set of questions 👏

[droidy 91]

23 hours ago, Gruntfuggly said:

the monitor seems to think they are OK, but I think the charging cables (JST?) have got corrosion in the plugs

Wouldn't a lipo monitor plug into the balance port, so if the monitor is happy the charger should be happy?

If it's a monitor that plugs into the battery plug then you'd only see an overall voltage instead of per-cell - could one of the cells be below 3.2v so the charger sees it as bad and won't touch it? Lipo alarm would tell you.

If a cell or cells dropped too low you can force charge it certain ways but that's very risky and dangerous.

If it's purely the cable then yeah definitely replace it. Just cut and solder one wire at a time (or stagger the lengths, or be very careful and insulate bare wires with tape) or else you might short them and find out how zesty even one lipo cell can spark...

[wolfdogstinkus 1719]

Hopefully you'll get your lipo working again but if not, I believe the battery tray in the blitzer beetle can be modified in height fairly easily, I used to use a massive 5000mah 11.1v brick in my blitzer.  I think you just add longer screws and a spacer or do away with the original battery holder and cut slots for velcro straps.  No matter how secure you think your battery is, it always seems to find a way out and go sliding down the tarmac at 40mph!!.