EBS_freak Posted August 25, 2019 Share Posted August 25, 2019 On 24/08/2019 at 19:14, Chienmortbb said: My Trustfire also measures a tad over 8.4V fully charged. Is this your Trustfire? Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted August 28, 2019 Author Share Posted August 28, 2019 Yes that’s the one. Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted August 31, 2019 Share Posted August 31, 2019 Yes! 8.4v I shall post up with multimeter reading. Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted September 1, 2019 Share Posted September 1, 2019 Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted September 1, 2019 Share Posted September 1, 2019 I'm tempted to get 4 of these for my bass... certainly cheaper running LEDs on these than pretty much anything else I guess! Quote Link to comment Share on other sites More sharing options...
stingrayPete1977 Posted September 1, 2019 Share Posted September 1, 2019 The battery in my jazz bass is behind the pickguard (as you know Russ), I could fit one of those and a USB port to charge the bass somewhere. Hhmmm 1 Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted September 2, 2019 Share Posted September 2, 2019 22 hours ago, stingrayPete1977 said: The battery in my jazz bass is behind the pickguard (as you know Russ), I could fit one of those and a USB port to charge the bass somewhere. Hhmmm Have you got a router bit for your dremmel? Talking of dremmels, I've got a project for soldering club I'm working on at the moment and could do with some box cutting advice! Sounds like a project night and pie outing! 1 Quote Link to comment Share on other sites More sharing options...
stevie Posted September 2, 2019 Share Posted September 2, 2019 I suspect 8.4V is enough for most purposes. I wonder if the rechargeable lithium batteries last longer than non- rechargeable alkalines. It wouldn't surprise me. Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted September 2, 2019 Author Share Posted September 2, 2019 26 minutes ago, stevie said: I suspect 8.4V is enough for most purposes. I wonder if the rechargeable lithium batteries last longer than non- rechargeable alkalines. It wouldn't surprise me. Hard to say as no manufacturer, that I know of, publishes battery capacity for non-rechargeable batteries. Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted September 2, 2019 Share Posted September 2, 2019 You may find this interesting... or not - https://www.powerstream.com/9V-Alkaline-tests.htm Quote Link to comment Share on other sites More sharing options...
Sven Posted September 10, 2019 Share Posted September 10, 2019 The trustfire mentioned above looks interesting, I like the idea of charging them with a small USB port rather than having to buy a charger (I don't have any rechargeable batteries in the house yet so buying a bunch of these + a charger is a mess). Assuming they will rate at 8,4 V as mentioned above, did someone notice any effect on the instrument sound, preamp response, this kind of things? Quote Link to comment Share on other sites More sharing options...
itu Posted September 10, 2019 Share Posted September 10, 2019 On 02/09/2019 at 14:51, stevie said: I wonder if the rechargeable lithium batteries last longer than non- rechargeable alkalines. The difference between primary and secondary battery is the discharge curve. Usually a rechargeable (secondary) cell has a curve, that looks a bit like a box: it can push lots of current and steady voltage but only a certain time and then the end comes very quickly. A common alkaline can push less current and the voltage curve is slowly descending. It is common that a primary cell has bigger capacity: it has not the space for the chemistry that is needed in secondary cells for recharging. So actually a bigger amount of energy in the same space. This text is a simplification but the basics are there. Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted September 10, 2019 Share Posted September 10, 2019 17 hours ago, Sven said: The trustfire mentioned above looks interesting, I like the idea of charging them with a small USB port rather than having to buy a charger (I don't have any rechargeable batteries in the house yet so buying a bunch of these + a charger is a mess). Assuming they will rate at 8,4 V as mentioned above, did someone notice any effect on the instrument sound, preamp response, this kind of things? No difference really - although the higher voltage may give you more headroom and better reproduction of transients. Anyway, the Trustfire appears to be good... although a tiny bit oversized. It will fit in the Gotoh battery boxes on my basses - but is defo a firm fit where other batteries will quite easily slip in and out. Not a real big issue really though! Quote Link to comment Share on other sites More sharing options...
Bill Yellow Posted September 11, 2019 Share Posted September 11, 2019 Years ago I bought a couple of specialist over-voltage PP3 type rechargeables, along with the special charging station they needed. This was just to use in an A/B switching pedal. Unfortunately, in that application they were entirely inappropriate and drained down in less than an hour. ☹️ Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted September 27, 2019 Share Posted September 27, 2019 800mah... https://www.amazon.co.uk/Rechargeable-Keenstone-Lithium-ion-Self-Discharge-High-Energy-3-Pack-Charger/dp/B078JMHHF8/ref=sr_1_8?crid=2C6JBSA7K8QFN&keywords=usb+9v+battery&qid=1569517299&sprefix=usb+9v%2Caps%2C146&sr=8-8 Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted October 3, 2019 Share Posted October 3, 2019 (edited) On 27/09/2019 at 07:06, EBS_freak said: 800mah... https://www.amazon.co.uk/Rechargeable-Keenstone-Lithium-ion-Self-Discharge-High-Energy-3-Pack-Charger/dp/B078JMHHF8/ref=sr_1_8?crid=2C6JBSA7K8QFN&keywords=usb+9v+battery&qid=1569517299&sprefix=usb+9v%2Caps%2C146&sr=8-8 Crumbs. In a test side by side, these make the Trustfire performance look pants. They just keep going... and going... and going. I reckon these are a must for anybody with a LED fretlight fetish. edit - metered at 8.4v Edited October 4, 2019 by EBS_freak Quote Link to comment Share on other sites More sharing options...
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