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Homemade Trend Airshield Pro batteries?

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Forum topic by Toller posted 03-22-2020 12:16 AM 892 views 0 times favorited 26 replies Add to Favorites Watch
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Toller

64 posts in 2409 days


03-22-2020 12:16 AM

My 10 year old battery doesn’t hold much of a charge anymore; but $70 is a lot of money.
I’ve googled and people rebuild them, replace them with battery packs, do something I don’t understand with a battery charger, and probably other things.
So, what has anyone here done that they are happy with?


26 replies so far

View ibewjon's profile

ibewjon

1790 posts in 3603 days


#1 posted 03-22-2020 12:50 AM

There are places that rebuild battery packs, with some savings. I don’t have a name to call or any experience doing it, but I don’t think the savings was much over 25%.

View Joel_B's profile

Joel_B

407 posts in 2191 days


#2 posted 03-22-2020 12:53 AM

Batteryspace.com is a good place to buy rechargeable batteries

-- Joel, Encinitas, CA

View mike02719's profile

mike02719

247 posts in 4595 days


#3 posted 03-22-2020 01:05 AM

Most rechargeable batteries from that era are made up from individual nickel cadmium cells connected in such a way to provide required voltage. Back in my working days, I repaired lots of ni-cads at a fraction of battery replacement costs. If you are lucky, the batterypack will be held together with screws. If this is so, simply open it up and expose a group of cells soldered together. These can be replaced with the correct ampere hour cell and you are back in business. You need some electrical and soldering skills to do this, so be careful.

-- Mike, Massachusetts

View Rich_Aldrich's profile

Rich_Aldrich

4 posts in 125 days


#4 posted 04-11-2020 12:56 PM

I tried putting new batteries in my battery packs and it didn’t work for me. I cant remember where I got the batteries.

Rich

View JoeK1's profile

JoeK1

29 posts in 1224 days


#5 posted 04-11-2020 03:35 PM

I have 5 Trend batteries and the best run time has been 4.5 Hrs. I replaced the cells in one bad battery with (3) 4/3 AF NiMH Battery with Tabs (4500 mAh) Item # 15738 $6 ea. from OnlyBatteries.com. That p/n was the highest current rating of several choices. The average run time is about 2hrs with the replacement cells. Replacement requires soldering the taps and wire, reinstalling the original current limiting device and insulating with shrink sleeving. It is not a trivial change out. The replacement cells are slightly larger in diameter but will fit w/o shrink sleeving covering all 3 cells as a pack like the original. I’m not exactly thrilled with the run time but it will recharge in 3-4 hrs.
If you change battery chemistry then you should change to a compatible charger. Three 3.7V Lithium Ion 18650 batteries w/tabs wired in parallel will also fit. These cells do not appear have integral current limiting devices. I also purchased the Li-Ion cells $14 ea, but decided that the potential of a thermal runaway on the top of my head might be distracting.

View tvrgeek's profile

tvrgeek

1008 posts in 2459 days


#6 posted 04-11-2020 03:58 PM

Batteries Plus has about everything, plus they rebuild. First, you need to know what the cells are. NiMH, NiCad? Chargers are unique and the wrong charger is how yo get a fire. Sometimes, you can rejuvenate a NiCad with reverse polarity, but sometimes it explodes. Sometimes freezing them helps. Sometimes not. Fact is, batteries have a life span so anything using them you consider as disposable at some point in time.

View CWWoodworking's profile

CWWoodworking

890 posts in 988 days


#7 posted 04-11-2020 04:15 PM

70$ for 10 years of use and the battery is too expensive?

View LittleBlackDuck's profile

LittleBlackDuck

5003 posts in 1630 days


#8 posted 04-12-2020 05:14 AM

Simply buy a new battery… Put a $ value on the time you waste on an cheaper alternative and it’ll cost you twice as much.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View TheDane's profile

TheDane

5829 posts in 4473 days


#9 posted 04-12-2020 01:49 PM

Simply buy a new battery… Put a $ value on the time you waste on an cheaper alternative and it ll cost you twice as much.

- LittleBlackDuck

Amen … well said!

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View RobS888's profile

RobS888

2829 posts in 2655 days


#10 posted 04-12-2020 02:03 PM


Simply buy a new battery… Put a $ value on the time you waste on an cheaper alternative and it ll cost you twice as much.

- LittleBlackDuck

Amen … well said!

- TheDane

This is true, but many have the model with discontinued batteries, so make ‘em or set aside the mask.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

View splintergroup's profile

splintergroup

3867 posts in 2032 days


#11 posted 04-12-2020 03:07 PM

If you know the voltage, you could see if one of your cordless drill batteries could be adapted (probably with a belt hook for the battery and a power cable to connect up).

View LittleBlackDuck's profile

LittleBlackDuck

5003 posts in 1630 days


#12 posted 04-12-2020 07:27 PM

You’ll probably find that the Trend Airshield Pro could be one of your best lines of defence in this time of the 19 crisis…

Just get off your arse and buy a battery to maybe save your life… or aren’t you worth $70… Not for the workshop but when you go outside. It’s not like you have the opportunity to travel around looking for a battery builder.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View SMP's profile

SMP

2274 posts in 715 days


#13 posted 04-12-2020 09:12 PM

I am the kind of guy that rebuilds battery packs. Actually was going to even rebuild the packs on a Honda Civic hybrid. But i mainly do it since they usually last 2 or 3 years, and I can rebuild for around $6 per cell. If ai knew it would last 10 years I would probably just pay the $70. As a lot of times taking apart old packs the little plastic clips break and then they don’t stay together right etc.

View RobS888's profile

RobS888

2829 posts in 2655 days


#14 posted 04-13-2020 03:24 AM



I am the kind of guy that rebuilds battery packs. Actually was going to even rebuild the packs on a Honda Civic hybrid. But i mainly do it since they usually last 2 or 3 years, and I can rebuild for around $6 per cell. If ai knew it would last 10 years I would probably just pay the $70. As a lot of times taking apart old packs the little plastic clips break and then they don’t stay together right etc.

- SMP


I’m really suspicious of the 10 year claim since my wife went though 4 in 5 years. But they don’t make them for her model anymore, so this thread is pretty timely for us.

So could you guys back off the admonitions to just buy them and let people that need to cobble something together talk about it, please?

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

View CWWoodworking's profile

CWWoodworking

890 posts in 988 days


#15 posted 04-13-2020 11:36 AM



since my wife went though 4 in 5 years.

- RobS888

It’s time for a new system unless she’s driving screws 8 hrs/day.

These things are so cheap compared to everything else now days, IMO, it’s silly to mess with rebuilding batteries.

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