Avenger 2.0 Posted May 22, 2019 Share Posted May 22, 2019 21 minutes ago, Anaconda_ said: This is an interesting solution. Vmount to dual npf pries with power meters and dtap. Hot swappable external power that's pretty cheap to run all daylong. https://www.amazon.de/Baxxtar-1837-2-V-Mount-Adapter-Ausgang/dp/B077VQ7PVL Have one and works fine, but the F970 batteries are not hot swappable as they are internally connected in series. Disconnect one and the rig loses power. Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted May 22, 2019 Share Posted May 22, 2019 5 minutes ago, Avenger 2.0 said: Have one and works fine, but the F970 batteries are not hot swappable as they are internally connected in series. Disconnect one and the rig loses power. Oh that sucks, kind of defeats the purpose of mounting two batteries for me. Do they both discharge at the same time too? For example, if 2 batteries gave you 4 hours, could you run it for 2 hours, change 1 battery and still have 4 hours to go? Quote Link to comment Share on other sites More sharing options...
Avenger 2.0 Posted May 22, 2019 Share Posted May 22, 2019 4 hours ago, Anaconda_ said: Oh that sucks, kind of defeats the purpose of mounting two batteries for me. Do they both discharge at the same time too? For example, if 2 batteries gave you 4 hours, could you run it for 2 hours, change 1 battery and still have 4 hours to go? They discharge at the same time as they are just connected in series to get the 14,4V needed (2x7,4V). You should change them at the same time and only use equally charged (and same capacity) batteries together. Guess the only advantage is that F970 batteries are cheaper than V-mount batteries and some people might have already lots of them. Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted May 22, 2019 Share Posted May 22, 2019 2 hours ago, Avenger 2.0 said: Guess the only advantage is that F970 batteries are cheaper than V-mount batteries and some people might have already lots of them. Yeah, but even still, I think you'd be better off with one of the smaller sleds that take 1 battery. That way you can just have 3 on rotation and shoot all day long. 1 charging, 1 charged and 1 on the camera. Thanks for the info! Quote Link to comment Share on other sites More sharing options...
Emanuel Posted June 5, 2019 Author Share Posted June 5, 2019 https://www.ebay.com/itm/Externe-Bateria-Energia-Supply-Para-BMPCC-4K-Blackmagic-Pocket-Cinema-Camera-FS/163596201134?epid=24031256197&hash=item261717ecae:g:dgYAAOSwOM5cifhG Quote Link to comment Share on other sites More sharing options...
Paul Jonathan Posted September 6, 2019 Share Posted September 6, 2019 Hey guys, I have been reading through this thread and I am still looking for a lightweight charging option. I stumbled across this dual battery pack from Tilta for two 18650 batteries. It says it will provide 8v through the dc output, which should be enough to power the camera if attached to a dummy lp-e6 to dc barrel battery? Or am I making any mistakes here? Not particularly set on the Tilta pack, but in terms of price and mounting options it seems to be the best one for 18650 batteries I have seen so far, or do you have other recommendations? Best, Paul Quote Link to comment Share on other sites More sharing options...
Yannick Willox Posted September 7, 2019 Share Posted September 7, 2019 https://www.nkon.nl/accessories/powerpax-cases/4x-18650-batterijhouder-met-losse-draden.html this should work, just need to add the right connector and the batteries. the batbox4k in this thread is very nice, but I did not get a response yet. So I might experiment with the 2.5 euro solution above ... Should give an extra 2h-2h30 on top of the internal battery. 3h useful battery life with a still compact solution would be great ! Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted September 13, 2019 Share Posted September 13, 2019 This looks really promising! https://www.newsshooter.com/2019/09/13/wooden-camera-power-solution-for-small-cameras/ Quote Link to comment Share on other sites More sharing options...
thephoenix Posted September 13, 2019 Share Posted September 13, 2019 1 hour ago, Anaconda_ said: This looks really promising! https://www.newsshooter.com/2019/09/13/wooden-camera-power-solution-for-small-cameras/ hmmm quite expensive for what it is. no a fan of the shape it has, there are others vmount batteries that are as handy and more convenient i find shapewise Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted September 14, 2019 Share Posted September 14, 2019 It's a lot smaller than v-mounts of the same capacity and has loads of dtaps for lights, monitors etc, as well as a dummy battery. It seems very versatile to me, and isn't much more than a v-mount. You do lose the ability quickly swap though, and of course with V-mouny you have more capacity options. Quote Link to comment Share on other sites More sharing options...
thephoenix Posted September 14, 2019 Share Posted September 14, 2019 24 minutes ago, Anaconda_ said: It's a lot smaller than v-mounts of the same capacity and has loads of dtaps for lights, monitors etc, as well as a dummy battery. It seems very versatile to me, and isn't much more than a v-mount. You do lose the ability quickly swap though, and of course with V-mouny you have more capacity options. vmounts don't have to be big. https://www.newsshooter.com/2019/07/03/fxlion-nano-one-v-mount-battery-review/ i don't really like the shape it has, must be ok on a tripod but handheld... sure it has a lots of connectors, just the shape doesn't feel right to me Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted September 14, 2019 Share Posted September 14, 2019 Right, but then you only have 1 D-tap and half the capacity. If it's not for you that's cool, I just thought it was a compact solution that offers a lot. thephoenix 1 Quote Link to comment Share on other sites More sharing options...
Emanuel Posted September 19, 2019 Author Share Posted September 19, 2019 https://www.newsshooter.com/2019/09/17/cine-x-battery-grip-for-the-bmpcc-6k-4k/ Quote Link to comment Share on other sites More sharing options...
crevice Posted September 19, 2019 Share Posted September 19, 2019 I am thinking about going with this core swx battery, since I already use a smallHD focus. I would power the monitor and the camera from this battery, by going to the 12v of the camera from the battery. Do you think this would work? I read earlier in this thread of some concerns of powering a monitor and the camera the same time form the same source, but this seems to be a different type of config https://www.bhphotovideo.com/c/product/1475115-REG/core_swx_npf_shd_npf_l_series_style_pack.html Quote Link to comment Share on other sites More sharing options...
Anaconda_ Posted October 10, 2019 Share Posted October 10, 2019 This looks like the best option available. Should be shipping later this month, but the preorder button adds a different product to the cart for me... strange. It also doesn't seem to show the price. Should run for 5hrs with the BMPCC4k https://www.soonwell.com/pre-oeder-ph70 Quote Link to comment Share on other sites More sharing options...
Emanuel Posted December 9, 2019 Author Share Posted December 9, 2019 Quote Link to comment Share on other sites More sharing options...
Yannick Willox Posted December 9, 2019 Share Posted December 9, 2019 18 minutes ago, Emanuel said: The designer of this power bank clearly knows something about batteries. He has a complete list of parts, and could be willing to share/license this for almost nothing. personally i cannot do this kind of DIY, but maybe some users on this forum have the skills ? @BTM_Pix ? imo this powerbank should power the p4k for at least 2,5 h, plus a perfect handover to the internal battery for an extra 45 min. The cost should be less than 120 euro, even when commercialised. Quote Link to comment Share on other sites More sharing options...
Yannick Willox Posted December 26, 2019 Share Posted December 26, 2019 The Muxtronics man answered : there were still a few little problems, and he has zero time to finish the development. In the meantime I got this BatPower EX7D 98Wh. It fits the smallrig powerbank holder on my smallrig cage. Great. The EX7D is about 18cmx2.3cmx8.4 - so is slightly larger than the website & manual state. If the size of the next model is correct, you can get 148 Wh in exactly the same case ! My first tests (after what I think was a full load, but not completely sure about this): BMCCP4K with an old 4/3 lens with OIS enabled / p4k lcd at 60% / recording to T5 drive : genuine Canon LP-e6n 1865 mAh battery : 44 min BatPower EX7D 98Wh : 270 min (with the Canon battery fully charged in the camera) Retested the Canon LP-e6n, this time OIS disabled / p4k lcd at 30% / recording internally to SD card : 55 min In theory this would result in 337 min on the BatPower EX7D 98Wh - need to rerun a very long test to confirm this ! Bonus : the powerbank outputs an almost steady 15V. There is also a 20V mode, but that does not seem to work on the p4k (need to test if this is maybe defective ?). When the capacity goes to 0, it switches off. Transition to the internal battery is flawless and recording continues ! This gives at least an extra 44 min to the 270. Or 55 + 337. In theory, with the 148 Wh version, this results in 7-9h of actual recording time. I think the 98 Wh is enough to get through a full day of (30%?) shooting. You can also charge the powerbank while it is powering the camera ... The only downside for me is that I expected a slightly smaller enclosure, but it fits the Smallrig holder perfectly. I either mount it on top, or I can hang it under the camera, which is much more stable handheld, but needs some time to put on a tripod. edit: i was shooting max 4k dci, braw 12:1 BTM_Pix 1 Quote Link to comment Share on other sites More sharing options...
Emanuel Posted December 30, 2019 Author Share Posted December 30, 2019 Quote Link to comment Share on other sites More sharing options...
Yannick Willox Posted December 31, 2019 Share Posted December 31, 2019 That is a reallly bad solution, only 7.4v. Extended use will probably destroy the camera. My solution above stays above 14.5 V all the time. Emanuel 1 Quote Link to comment Share on other sites More sharing options...
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