VapingBad

Soldering these thick wires is not class 101 stuff and before you get the new board I would have a good practice soldering them to get nice shiny clean slim joints, lots of info on the web, but practice makes perfect. We all have to start somewhere and top marks for going for it.

Could it be the fire switch earthing, IIRC it has to be isolated as one side is battery +ve.

Fair enough I'll shut up then lol I was just concerned with noobs trying it with a 15 W iron and keeping the heat on too long really.

You can get 25Rs with solder tabs, Ecoluxshop in eBay UK used to carry them, not a fan of soldering onto cylindrical cells, but understand it is a proof of concept thing.

Tin the wire first and get it hot/wet just above the pad then push it on to the pad with the iron and feed a little fresh solder and you can get it on quickly.

Probably more the time the iron is on the joint than out and out temp, use a good powerful temp controlled iron and set the temp to what works well with the solder and wire you are using.

Yes by the spec, but I don't know what the quality of the brand is like.

It is still important to have them matching as they will all share the same discharge current it will shut off once the smallest cell hits the soft limit and would they need more balancing during charging. You can use 6 cells in 3s2p config as you describe. There are batteries as thin as 18 mm out there and I would think it is not worth the effort. The wire between the cell needs to be rated 23 A or more the same as the main battery leads os it is going to take up some space if the cells are not stacked like in a battery pack.

It's keeping you in work @basilray Loving the interactive guide by the way.

Thanks John, I have read all of battery Uni, when it was on the Cardex site, but not really thinking at Lipos at the time. I was looking for something simple to tell folks that will never read it. Not just for the DNA200 or even just LiPos, people tend to think of batteries as always happily supplying the cdc and in the last year they are more and more using the bdc and don't get that the output V is going to take a dive at these currents. As you know the battery has to work a lot harder at lower SOC. EG I tell people a good general rule for max current VW boards is wattage/2.5 to allow for sag and electronic efficiency of the converter, not strictly accurate, but a good rule of thumb for those that will never learn Ohms law. I will have a reread of Batt Uni this week.

Thanks John, I knew it wouldn't be that simple, but I believe the capacity largely went by a proportion of the chemicals entering a state where they are not reacting during charge & discharge. I wouldn't expect the healthier section of the battery to be able to provide more current to compensate either. I am over simplifying, but LiPos are new to me. Is their a rule of thumb rate that is applicable to help us choose a battery spec? I know that it would never be "accurate" in most cases, and the battery monitoring will protect us, but could be useful.

Lipo's max continuous discharge current rating is C times capacity, so if I get a new 23 C 1 Ah Lipo that has a max cdc of 23 A, but when it is near the end of it life it's capacity will only be 800 mAh so the max cdc would be 18.4 A. So if we start with a battery with max cdc >= 28.75 A ti will still be at least 23 A when it is only at 80% capacity.

Rather than start a new thread I thought I would just ask this here. Re max current and battery rating: Strictly speaking shouldn't we looking at 28.75 A min current rating new if we want to run at 200 watts when the battery is near the end of it life (80% capacity)?

Looked at the pick and looks like shorting somewhere maybe between loops of the coil, on a steel wick shorting into the wick or even the atty body.

Sounds like either TCR not matching the wire or a connection problem, but just guesses.

Cheers John, you guy's are doing a cracking job, not just with the product but also the communication in this forum. I didn't thank you for the 4.1 V charging feature you put in the beta that next day and went live a couple of days after that, very fast work for a forum suggestion from a unknown bod like me. So thank you, I have wishes my Xtars had this for years.

A couple of very small suggestions for the Mod tab: When running the "Watt-Hour Calculator" add a button to the dialogue to "Use this value" or use "Update" & "Cancel" buttons that puts the calculated value in the "Capacity" text box. Have a button next to the "Mod Resistance" to "Measure" to get the current value or R so we can put a dead short on the 510 (EG M7 bolt) and get a accurate reading.

IMO web based client will still have to get past platform (win/mac/unix) security to talk to the USB port, which would need different treatment on each platform, users would get warning dialogues or no USB comms at all, nothing much to gain, poorer performance and the variables of different browsers would make it harder.

http://www.stealthvape.co.uk/evolv have then in the UK £6 P&P about £4 IIRC.

F11 or View-Full Screen for full screen

There is no problem the 5 V from the USB is just converted to a higher voltage and a dedicated chip (I believe) controls the battery charging, monitoring and maintenance, but battery type needs to be set to the correctly type and IIRC the capacity in the EScribe software. I will not try and get any more technical than this as Evolv can provide the details, but I do think these devices will be less confusing to customers that the one you mention, after all most of the world are used to charging their phones like this.

On DNA30s I have used a spring with a diameter too big for the +ve battery terminal for -ve connection and a completely flat +ve connection that will not make contact with the -ve end of batteries with a flat bottom and heat shrink extending over the bottom like 25R & VTC4. It is the flat positive connection that really provides the protection, I have fitted batteries the wrong way 3 or 4 times in another DNA30 I did like this and it is still going after 18 months.

It is a holiday weekend in the US and they are trying to get a product launch out. I think you are over reacting, this is still being developed and they correctly decided to choose the platform that would support the highest number of users first. Because this has to access hardware devices writing a web or multi platform app is a lot more complicated because of the different security requirements and harware layer abstractions all of which need testing to separately for each platform. Let them get it stable on Windows and then take that codebase and convert it.

I would think it is just the danger of shorting a cell if the wires touch, if the soldering iron tip bridges 2 or the solder bridges 2 of them.

V9 Firefox Win8.1 Ultimate 64 bit. (I realise that most of these are ones I highlighted before and you have not had time to address them, but thought a complete list would be more helpful) Mod -Interactive mode: "Click the Type combo box" slide (slide 3): The blue box with contextual info is behind the boarder on it's rhs cutting off the last couple of letters. I get an incorrect dialogue if I click the Type combo, but I think that is more that is the next slide but it does not move to the next slide and no next button is displayed. The red highlight boxes miss the Electrical section - they just high light the other 2 sections in time with the audio. "Type 26" slide (slide 7, 1st of it name): the name shown in the menu gives the impression you should type something and it shares this with the next slide, in fact it is the first part of a 2 slide segment where you just need to press next. This is done in a few places and I fined it a little unintuitive and suggest changing the naming of some slides and highlighting the next button when the commentary ends, a nice blue animated glow effect just to draw the eye to it maybe. A "[click next to continue]" at the bottom of the large blue box with the commentary text in is another way, or even do both. "Type 26" slide (slide 8, 2nd of it name): Still has two audio tracks playing at the same time. "Click the case analyser button" (slide 9): the button click area is a bit to thin and doesn't work if you click the rhs of the button. "Click the OK button" (slide 10): the room temp dialogue showed briefly at the end of the previous slide and is no longer visible to click so you need to use the menu to proceed. "Click the Stop button" (slide 12): Still says an hour, John said it takes about 6 (linked in previous post) "Type 45" slide (slide 15, 2nd of it name): The commentary asks you to type 50, but this is flagged incorrect and a speech bubble briefly appears with "type 45" in, but I cannot backspace or delete the 50 even if I move away from the slide and back using the menu. There is a submit button bottom lhs that flags incorrect if you press it "Type 85" slide (slide 16): The commentary asks you to type 75, but I waited for the speech bubble to briefly appear on mouse over with "type 85" in, 75 was the correct answer, I dbl clicked to edit the value on this one, went back and checked slide15 and double click didn't work on that slide to edit the value. Overall it is very good and none of the above stops you learning how to use the product.