We will be waiting for you to review this charger.
Yeah, I ordered one too. Looking forward to getting it to check it out & see how it stacks up against the old tried & true Lii 500.
I ordered one as well. I’m still waiting for it to ship.
Guys, we are waiting for your reviews! It is a pity that I do not see support HiLV (4.35) and LiFePO4… Why does the Liitokala chargers in the engineering line (Lii500, Lii-400) not add support for these cells, аnd in the line of cheap chargers (Lii 402, Lii202) there is support. Strange logic.
Only difference I see with the (in my opinion very good) LII-500 Engineer is . . . . . . new display, new looks. Is all.
Cheers,
Nico
Can it load longer cells than lii-500?
I could not find the detailed specification. Judging by this photo, 21700 is supported, but 21700 with protection will no longer fit
Looking forward to receiving mine, my only concern is that i have an original too and dont like that they changed the polarity. I mean I never liked how you put the cells in backwards on the original but stick with it now! Probably gonna mark them with red/green paint or something.
Yep, me too. Not sure if you noticed Fred, but it was a Pre-Order. Fulfillment is supposed to be by 18 June. Ward supplied me with that info. I think June told him. 
Where have you found where you can buy on pre-order at an interesting price?
- Support for 21700 cells.
- More spacing between slots.
- 2A max charging current.
- no 300 mA charge rate.
thanks
Going to wait for reviews, myself. If they’ve sorted the Lii-500 niggle of only charging to 90% on NiMH, then I’m interested 
What? The 500 only charges Nimh to 90% capacity? I never heard of that. Where can I read more about it?
I have not noticed that phenomenon with my Lii500.
In HKJ’s review:
Search for “Charge NiMH”; there’s a bit that says: “The termination look like a voltage termination and without filling the cell completely. Generally it looks like the capacity display is a bit high for NiMH cells.”
Looking at the graphs, it seems to be falling short by about 10%. The charger shows about 1900mAh - 2000mAh, but HKJ’s equipment only shows about 1700 mAh - 1750mAh going into the cell. The effect appears to be consistent across all four slots.
In his conclusion, HKJ again mentions that: “The charger is very good at charging LiIon, but stops a bit early on NiMH.”
I’m wondering whether the person who wrote the charging algorithm forgot to account for the pauses while it’s measuring the cell voltage.
Hmmmm…. Thanks for the info Phlogiston. I’ll have to look at/check mine out more closely. 
Now I understand why my Ikea Ladda AA 2450 mAh batteries last considerable shorter in my Logitech Mx Mouse, compared to using disposable batteries. Hope they fixed it with Lii-500S.