Massively Mini 300 Amp Battery

[@temporarilyoffline]

Recently Will Prowse did a teardown and found this battery is made up of 280ah worth of components and labeled 300ah. Watt Cycle has stood behind their product and offered refunds to customers who purchased this battery. If you got one, be sure to reach out for your refund! I think its "the right thing to do". Watt Cycle has removed this product from their shelves and will be fixing the things that Will found during his review. Bravo!

[@KD5DXN]

Great video 👍 Looking forward to the Black Friday live stream

[@temporarilyoffline]

Me too! Big things coming!

[@Chris-in-ky-ky4ckp]

TO, these sound like very interesting batteries! Thanks for the review. Hopefully the will function properly over the long term. LCARA Ham Radio -YT

[@temporarilyoffline]

Hey Chris! They should outlast me. I don't know how they figure that stuff out, but I ain't got time to test it.

[@agoraphobicadam1171]

We don't do anything before coffee. A men to that. Thanks for sharing, KO4HPC 73

[@temporarilyoffline]

You can make a lot of coffee with this thing!

[@agoraphobicadam1171]

@@temporarilyoffline lol Sure can. :)

[@JoeSoubie]

I have to move my QTH to a new location and I'm concerned about the capacity and cleanliness of the power available. Thinking about battery power to run it. This sounds like a great battery to power it. Ir should I look at multiple 100 amp batteries?

[@temporarilyoffline]

Work backwards from the goal - what kind of uptime do you want and what's your tolerance for outages? n+1 design, etc etc etc

[@Dram_bam]

TO.. if radios want 13.8, how do 12v batteries work?

[@temporarilyoffline]

Radios want 13.8 to deliver the specified wattage, less volts = less watts out to the antenna. Up to a low point where the radio just doesn't work anymore. Most 12v batteries put out a range from 10-14v as you use them.

[@Dram_bam]

@ thx T.O

[@Siskiyous6]

Voltage is nominal ​@@Dram_bam

[@PatrickKQ4HBD]

​@@Dram_bam12V is just the nominal voltage, the common name for a standard. It's like saying that I drive a half ton pickup.

[@Dram_bam]

@@PatrickKQ4HBD that makes sense. Gotcha. Thank you 🙏 for the help always

[@Siskiyous6]

That is the battery my boat needs

[@temporarilyoffline]

Power for a whole week!

[@davidmoore6020]

Can you please measure the top of the battery minus the handles to give a true dimension of the battery case.

[@temporarilyoffline]

I totally get why you want those numbers, but having the battery in hand, I can tell you that removing the handles doesn't gain you any space savings. The handles when stored do not stand proud of the top of the case, they sit below the terminals. If you remove the handles, the side-side dimensions also don't change since the handle mounts are moulded into the case. All that to say this: 15.12 x 7.64 x 10.04 inches | 57.32lbs

[@davidmoore6020]

@@temporarilyoffline I'm planing to cut off the handle extrusions on both sides to make them fit into my battery compartment under the stairs in my RV.

[@temporarilyoffline]

@davidmoore6020 I dig it. If you do a really good job. You're knocked down to 13.5"!

[@davidmoore6020]

@@temporarilyoffline​​⁠that’s what I was thinking. I have a 28 inch to 29 inch space to put them in. I’ll make it work. I ordered on Black Friday, hope to get them soon.

[@MI7DJT]

Wowzers! I'd like a stack of those plz and thank you!

[@temporarilyoffline]

You got it!

[@nelhead4807]

I couldn’t order off the website so thankfully Amazon had them.

[@temporarilyoffline]

Glad you found it on the jungle market. Looks like we sold out their website!

[@stevenemert837]

Surprisingly massive capacity. I had to look up how many AH a regular lead acid car battery has, since normally they only advertise CCA - cold cranking amps. Wow. Only average 38 AH in a car battery roughly the same physical size!

[@temporarilyoffline]

Yeah, it's crazy the amount of weight we used to lug around!

[@PatrickKQ4HBD]

True but those are different tools for different purposes. You might need 500 - 750 for a few seconds to start your car.

[@temporarilyoffline]

@@PatrickKQ4HBD Agreed

[@reidlanham2011]

1:34 30 hours is just a tad under 3 days. :)

[@victorcharlie7491]

It's actually a 1 1/4 days, lol. He needs more coffee ☕!

[@temporarilyoffline]

Don't forget the nights!

[@robertmeyer4744]

That a lot of watt hours. Will run that 12V refrigerator a long time. Great boondocking battery ! Can be a fun POTA week on them and i talking KW POTA ! Some changes coming to the RV industry in like 2028 . Also effects campers. Them 1 LB throw away tanks will no longer be sold. Have to get refillable ones. They been on the market years now and works out cheaper . The refillable propane 1 IL ones have that safety valve as well. Many may ditech propane and go electric . that 300AH good start ! They do make a adapter hose to run like Coleman stove on big 20LB grill tank. That what we do . but 10 LB one. They have 5/10/15/20 /30/40/50 LB ones and bigger . I worry about shortage on propane. This happened in NY one winter. left so many in the cold. A small mini split heat pump can be used in RV for heat . The only problem is under 0 F heat pumps can quit . some quit below 32 F . Love big AH battery ! The LiFePO4 changed . Changes in electrolyte and plate making them better ! The cycle life is going up as well ! 73

[@temporarilyoffline]

You got it! It's all about the capacity, and this one is a champ!

[@dan32one44]

Been waiting for my battery six weeks and FedEx is telling me they don’t have my battery be careful…

[@wattcyclepower]

The 300Ah battery was on backorder, but we shipped it out as promised. We understand your frustration with the delayed delivery and the conflicting information, and we sincerely apologize for the inconvenience this has caused. This is certainly not the experience we want our customers to have. Your order is on its way, and we have sent the tracking information to your email. Please check your inbox for the details.

[@temporarilyoffline]

I reached out to Wattcycle to see if they had an answer. I see they have replied.

[@victorcharlie7491]

I wish humans came with bigger batteries, and usb, great battery review, tnx Man!

[@temporarilyoffline]

Me too!

[@akiddoo8113]

With winter field day not far off don't forget to put your lipos in the freezer so they are nice and fresh for the event. 🥶

[@temporarilyoffline]

Pro tip! 🤣🤣

[@MrD308]

Hmmm, 300 amp advertised with a 200 amp BMS.

[@temporarilyoffline]

Different maths. 300 runtime. 200 delivery.

[@haxboi5492]

Amp Hours and amps are very different things

[@ragheadand420roll]

Perfect for a 3000 watt inverter

[@temporarilyoffline]

Indeed! That's next on the list

[@RodneyTronic]

A 3000 W inverter will want more than 200 Amps supply. I think I saw that this one is max 200 Amps supply. I'm looking at 3 x 100 Ah batteries in parallel to get 300 Amps supply which also allows for losses in the inverter ie you might need 3300 Watts input with 10% loss to get 3000 Watts output.

[@coreybabcock2025]

I have 2 600 ah batteries here in my van I live in in parallel so 1200 ah !

[@temporarilyoffline]

You are living the dream!

[@chriswhite1318]

30 hours equals almost 3 days? 🤔

[@temporarilyoffline]

Gotcha! Seriously though, are you not gonna sleep at all?

[@chriswhite1318]

@temporarilyoffline not as long as the meth holds out. Thanks for the work that you put in on your channel. I appreciate your sense of humor.

[@GerForever]

Wow that is small for a 300 I use a 200 in my house for backup and it's a fair bit larger

[@temporarilyoffline]

I was pretty shocked to see it

[@samuelfox8126]

New chemistry= less foam and air

[@temporarilyoffline]

There is a lot of empty space in the typical 100ah battery case.

[@samuelfox8126]

@temporarilyoffline yep

[@sparty837]

You have a battery problem and need to join "battery anonymous" to quit your habit.

[@temporarilyoffline]

I can quit anytime!

[@Sonicgott]

@@temporarilyofflineNo such thing as too many batteries!

[@temporarilyoffline]

@@Sonicgott If nothing else I can build a fence!

[@KD6HOF]

... "Back ordered" 😞

[@temporarilyoffline]

The TO. Effect!

[@KD6HOF]

@@temporarilyoffline LOL, Sh!t man, you're as bad as Will Prowse...

[@GregNTech]

So they cheated to get 300ah. I would like to see that test stopped at 10v. And a true amp hours rating.

[@temporarilyoffline]

This isn't the first battery I've seen to do this new low voltage rating. 9.2v isn't that useful to me.

[@GregNTech]

@temporarilyoffline Correct me if I'm wrong, but I thought it was bad for LFP cells to go below 10v

[@temporarilyoffline]

@@GregNTech That's the rub - I'm not a chemist, but what I can say through my observations - this is the most densely packed battery to date. Battery tech changes all the time. I'll likely never run this below 10v myself. YMMV and all that jazz. I've seen another battery mfg market a battery that has this same cutoff and high density vs. package size, so its either A) a complete lie or B) some new to market tech. Time will tell and I don't know of anybody that can do 5000 cycles "at home" - at a 10a drain, that would take over 20 years to complete.