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I’ve had cheapies for over 5 years for ryobi, I always reach for them before the original ones, longer running times and none have failed yet

In 2018 I bought a 5Ah non-genuine Ryobi-compatible battery from the Jungle website for $37. My brother-in-law used my 10-in brushless chainsaw continuously for 40 minutes on light shrubbery with that battery, which is still going strong.

I bought two 6AH none genuine batteries for Ryobi for $65 on Amazon  and they were delivered the next day I live in Perth for use in my lawnmower they work great no problems. They perform exactly like the original batteries.

I have been using “power cell” Ryobi & Makita replacement batteries for the last 4 years - NO ISSUES I am very happy.

I've seen videos on Jumpstarting failed batteries like RYOBI haven't tried it myself. All Lithium Batteries should be cheaper as Lithium has gone down 80% in the last two years.

I have run Makita for many years and am yet to replace a battery although I have a few so they don't get a lot of work.
I would be wary of knockoffs given all the stories we've seen of cheap scooter and bike batteries going up when charging.

I’ve seen some of these copy batteries pulled apart & compared to the construction of the genuine product, not an electrical expert but the copies look “dodgy”. I would be very very careful when recharging the copy. I was on the verge of buy the knock off battery until I saw the comparison. I would advise anyone considering purchasing the copy to do some due diligence.

I've tested a couple of the knockoff batteries and they NEVER come close to their rating.  They also don't last as long and the ones I tested, the cells are NOT rated for high current draw.  Maybe in AU you pay a premium for genuine  Ryobi batteries, but here in the US you can find good deals that drop the cost of Ryobi batteries to just a little more than these knockoffs from time to time.  I now just use my knockoffs for Radio and lights and light load stuff.  I went as far as to put balancing leads on some of my knockoffs so I could properly balance/charge them once in a while.  This fixed two of them that wouldn't charge anymore. but now they have a balancing cable sticking out of them.

For me, I will stay away from these knockoffs, but maybe in AU or other countries they make sense due to an import premium?

Good Deal. My Wife Is Indonesian, And Her Father Hates Anything Made In China, So When My Kids Were Born I Wrote Made in USA On Them Took Pics Of Them And Sent The Pics To Her Father. Fun Fact.

I've been using Ryobi tools since 2008 and I've tried the knockoff batteries and have had terrible luck. I had one in a light and with 3 bars it went dead in 5 minutes. I buy Ryobi tools only when on sale and I buy them with the batteries and chargers. So right now I have 10 4 amp batteries and a bunch of chargers. All of them work. I also have 4 off brand and none of them work. Even when they do work they don't run as long as a real one. They get very hot in some tools and one of my Bluetooth speakers it wont even click in.

The only issue with 3rd party batteries is the quality is highly variable, the manufacturers take shortcuts with the BMS and thermal protection. You can’t tell the quality without opening them.  

I’m fine with buying 3rd party batteries but I never leave them charging unattended.

I got a nongenuine replacement for a Makita battery - it had great capacity for a while then refused to charge   I was curious and pulled the battery apart and found one cell group (two cells paralleled up) was read zero volts. I replaced the two cells with similar capacity cell and charged all cells individually to the same voltage. I also pulled the genuine Makita battery apart to see any difference.  The real difference is in the quality of the BMS - the genuine unit was far superior, while the knocking was very rudimentary. Eventually the battery pack failed again this time with smoke coming out when used. The original battery were now useless and I could no long use the replacement so I had to dispose of all batteries and the drill. I don't think Ryobi have batteries that are the quality of Makita or other top brands so it would be interesting to see someone pull apart one.

i found out there were "9ah" battery packs available from china.   i though "oh yeah, bull shit".   i watched some videos testing them and found performance was inconsistent and/or poor.   then i saw a video by some poms who, judging by their tools in the background, really worked their stuff hard.   they were raving about how good 'waitley' packs from china were.   they bought 6ah and 9ah sizes for their makitas.   so i bought 2 9ah packs.   i agreed with them.   theyve really got 9ah in them.   they were so good that ive bought 2 more.   it cost me about the same price for 18ah of battery power as one 6ah makita.   furthermore i saw a video of a makita 6ah pack dismantled and the wire routing was very questionable.   beware, i could only find waitley batteries to be available from waitley on aliexpress and as you can expect from china there are waitley knockoffs.   late news- i just went looking for the video i mentioned and found what may have been the same channel saying that it seems waitley battery quality has dropped.

Those OEM batteries are older than you are estimating - they all have the manufacture date on the base. 4Ah is from 2013 and one of the 5Ah is from 2017 - 11 years and 7 years respectively, pretty good life span really. The other 5Ah would be about the same age since the design has changed a couple of times. Yeah the new ones are expensive but you can often get them cheaper with a tool - I bought a 5Ah + 2.5Ah kit that came with a free hammer drill and charger & was cheaper than a 5Ah battery alone. A second drill is remarkably useful actually, for example if you are putting in a number of large screws or bolts - one drill has a small drill bit for pilot holes, 2nd drill has the large bit and then impact driver for putting the screw in, very efficient!

The genuine battery has a long warrantee, I think the more recent ones have a 5-year warrantee. The warrantee used to be 2 years. I would be checking the manufacture date and asking staff at the tool shop of Bunnings. When I had a battery die on me after it was rained on, the staff told me to take it in and they replaced it even knowing it had been rained upon.

Nice one man there is a lot more than just Batteries made in same style factories LIKE Oil and Fuel

So I just received one of these from EBay and tested it with my 'Load Tester' at a constant load of approx 5 Amps (many tools would expect this, and more).
My 10 Year old Ryobi 4AHr Battery lasted 36mins with a calculated rating of 3.06 AHrs (regardless of how accurate it is, this provides a reference point).
The brand new knock-off 8AHr Battery lasted 32mins with a calculated rating of 2.69AHrs...not even as long as the 10 Year old Ryobi.  So even though it was cheaper, I hoped it would at least last as long as the Ryobi 4Ahr battery.
* Caveat : not from same supplier as original Video, so could just be a crap supplier.

Completely agree. Even at 4Ah, it’s a bargain and can get the work done. The only consideration that’s hard to counter relates to the quality of the electronics inside and potential fire safety. My 4Ah 3rd party unit works well, except it doesn’t flash the charge level light on the battery. When the charging completes via the indicator on the charger, the battery shows full. No problem.

This sounds more like an Australian thing than a Ryobi thing. Because here in the US, they basically give them away.
I've stopped keeping track of my batteries. I'm not even sure how many unopened batteries I've got. There's a free battery pack deal every time I buy a tool. They aren't even worth selling on eBay because everyone has the same problem, so they're dirt cheap there too.