battery

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  1. littlespark

    Solar So called “new kind of battery”

    Got a advert through the door, obviously targeted, as I have panels on my roof. A company who would install a battery system to store the excess electricity that my panels produce and I would be able to use that when it gets dark. I won’t mention the actual company, suffice to say their system...
  2. happysteve

    Brushless motor battery drills - unsatisfactory speed control, or just this model?

    Have had a Makita BHP458 (non-brushless) hammer drill for years, I love it, it's pretty indestructable and the torque's great, but the chuck's finally going. They seem to be moving to brushless motors now (for most of their combi drills). I've only recently bought a battery SDS drill (after 2...
  3. telectrix

    Van Battery.

    Mine just starting to play up. Goes flat overnight in the cold. Bear in mind it's been on the Hiace for 4 years and was salvaged from my old van then. just phoned local place... £95. searched ebay, Yuasa 90Ah, 4 year warranty. £85.99 with free delivery, bit currently has a 20% discount, so £68...
  4. happysteve

    Is there a standard battery for alarm system contol panels?

    (Domestic) I don't touch alarms, out of my area of expertise. However, while doing other electrical work, quite often I'll switch off the circuit (or board) and the alarm will go off, always due to the fact that the backup battery in the control panel is dead. Restore power, alarm stops. My...
  5. R

    2017 Ford Fusion battery help.

    I bought a 2017 fusion and learned the previous owner had battery problems. How might I use the forum to get advise on this topic?
  6. Dan

    Lithium-ion battery makers awarded nobel prize

    https://www.iflscience.com/chemistry/creators-of-the-lithium-battery-win-the-2019-nobel-prize-in-chemistry/ The Royal Swedish Academy of Sciences has awarded the 2019 Nobel Prize in Chemistry to John B Goodenough, M Stanley Whittingham, and Akira Yoshino for the development of lithium-ion...
  7. hey-hey-my-my

    Trouble with charging a large 12v battery

    Hello! I recently upgraded the 110ah battery in my camper van for a 260ah AGM one. My solar panels (200w via MPPT, soon to be doubled) struggle to keep up with my consumption, so once a week I hook up the battery to mains using CTEK's 5A charger, which supports AGM batteries but is not...
  8. M

    12v Battery. Pump and lighting. Recharge

    Hello everyone, hope you can help me. I have started a plan to build a small camping kitchen that fits into my 4x4, and comes out at the sight. I have the plumbing sorted, and quite proud of that, hot and cold water. My issue has come to the electrical side, running the water pump and lighting...
  9. R

    Battery Tester

    I’m looking for a battery tester for work, ideally for fire alarms and alarm panels. Does anyone have any recommendations?
  10. B

    solar pannel nickel-iron system question!?

    Ok, so I am a little stuck on one thing for a while now. For a nickel-iron battery bank of 24 volts, each cell is 1.2 volts and has a charging voltage of 1.65, so 33 volts is needed when for optimum charge. The 24 volt, 100Ah battery bank requires a optimal charge rate at c/4 (25 amps for a 100...
  11. M

    what's required (mains or battery)

    Normally I would install mains supplied and interconnected smoke and heat alarms in a rented property or in any alteration but I have a customer convinced that battery ones with radio link is acceptable. Any installs I do normally state wired, interconnected to be installed but an other spark...
  12. M

    Making a 12v 4s battery pack from 18650

    Hi, I have around 20 18650 battery just sitting around, so I thought of making a 4s 12v(well more like 12-16v battery depends on charge). That should be fairly easy overall, just looking for some advices to make it as good as I can. One thing I would like to try is avoiding soldering as much as...
  13. C

    18 volt solar battery charger

    Hello, hoping for advice on this... We intend to use 18volt Makita power tools high in the Khumbu mountains near Everest. With no mains power on site I’d appreciate any advice on an affordable yet lightweight, portable and efficient set up to recharge batteries. Probably x10 4.00 Ah units per...
  14. Sumer321

    Car battery drain

    Serious power drain on battery on Audi 80 1992.30 mins after turning engine off no battery power won't start.ALL main components seem fine.After turning engine off a humming noise comes from back of engine ?this stops if I disconnect negative terminal on battery.Could this be causing power...

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