In the past after some time, they were in stock again. Don’t know whether this will happen also this time.
Once my two 4200 mAh and my 8400 mAh packs die, I consider something of this German shop. Sorry, German only and I have no experiences with this batteries.
I’ve been checking the Hobbyking site from a UK perspective. The 4200mah Zippy Flightmax LifePo4s are no longer available. The 8000mah is available but there is now a £20 surcharge for delivery, taking the total to around £80. I’m not surprised about this.
I’ve just ordered some Panasonic 18650 LifePo4 cells from eBay to create a KX3 battery, I suspect this is the way we may need to go moving forward if the supply of these batteries dry up.
Their need is probably very much driven by the remote controlled hobbyists.
The two problems I see with the 8000mAh battery is that it’s 105WHr and that could be an issue taking on a plane. The second is the sheer up front cost should your battery swell and fail just after the waranty expires.
I’m super happy with my 4200 and will ensure it’s not abused if it’s now a “collectors item”. I think my LiPos which are 10 years old this year were never 4000mAh but probably 2800/3200 based on performance and also the original cheapo charger never fully charged them. Since moving to a B6 charger, the LiPos do last better.
I think it’s time to invest in one of Luc ON7DQ’s 18650 power packs and cell holder tricks for airplanes etc. anyway.
Further to replies above and in a similar vein. An 8.2Ah you would not in theory be allowed on an aircraft which might be why supply is difficult. I ordered a 10Ah about 8 years ago from China and I’m still waiting for it to arrive. Far better to use smaller batteries and harness them together. I have two pairs of 5Ah which I used last weekend. I used to have a 13.2Ah which was actually three 4.4’s in parallel. These big batteries were and sometimes still are used for a 100W radio.
All these have worked well and I have had no trouble apart from the usual swelling which seems to eventually occur with most of them paralleled or not. I un-parallel them for charging normally but I’ve had no problem charging while paralleled on many occasions using just one of the sense/ balancing connectors without trouble. NOT RECOMMENDED however.
You will get more flexibility with smaller batteries and the choice of stacking them or using singly for lighter applications
4S1P is made up of 4 cells.
4S2P is made up of 8 cells.
From a probability point of view the fewer cells you have making up your battery, the fewer things you have to go wrong.
But even if you order the 4S1P, you might actually get sent a 4S2P. Hobbyking are a bit like that, and that happened to me, and from the feedback has happened to others. Then you have to ask yourself if you want to go through the pain of sending it back - I just kept mine.
Batteries need a bit of TLC if you want long service from them, i.e. protect them from physical shock, don’t let them get too hot or too cold, always balance charge them, don’t overcharge or over discharge them, regularly check the cell impedance if you have the capability to do so.
In operation both banks will appear and work the same.