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Allow use of rechargeable batteries

While the smart radiator thermostats do seem to work with rechargeable batteries, you can never get rid of the low battery notifications and cannot tell when the batteries are about to die.
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  • This has to be fixed. I have 11 around my house and replacing 11 sets of double AA batteries every 9months or so is ludicrous and wasteful, goes against the green savings made elsewhere and the credentials of this organisation. Please fix. Soon.

  • Yes, I have encountered this previously & changed back to alkaline. I presume the ‘low battery’ indication is monitoring voltage & rechargeables are 1.2v as opposed to 1.5v.

    I think ‘normal’ battery charge falls away slower down to 1.0v than rechargeables.

    Perhaps just recalibrate to an absolute ‘LOW’ of 1.0v, with also a ‘MED’ above that.
  • Please make rechargeable batteries usable with Tado. It's amazing it's not already implemented.

  • Completely crazy that an energy efficiency product doesnt allow use of rechargeable batteries.

  • Fujitsu/Panasonic Eneloop Pro work for me and I rarely get the low battery warning.
  • Great to hear that Panasonic Eneloop Pro batteries work for you. I use them as well but ALWAYS get the low battery warning. Clearly not a simple fix.
    I just ignore the warning and charge them up
    before turning the heating back on after summer. The majority of them last through to turning the heat off again the following year.
    However, this seems against the professed values of Tado and I agree that it is ridiculous that this issue has still not been addressed.
  • I agree support for rechargeable batteries please
  • Enabling the use of rechargeable batteries would be a big plus!
  • Unlikely to happen because Tado cannot reliably predict the chemistry or age of your rechargeable battery.


    Regular batteries discharge in a linear manner, making the voltage drop down from 1.5V predictable. Rechargeable batteries discharge in a non-linear manner and the pattern of that discharge varies by brand and age of the battery. To overcome this Tado would need to use a sealed battery, similar to your smartphone.

  • Given the level of discussion, both here and other places, I am staggered Tado have not yet implemented a fix so that we can use rechargable batteries without having to have the 'low battery' notification constantly on.

    At the very least, some proper feedback - indicating either an estimated implementation date or a technical explanation of why it can't be implemented, should be provided.

    Come on Tado - show some customer consideration!!

  • I finally gave up on 1.2v rechargeables and though substantially more expensive, picked up some AA rechargeable 1.5v lithium batteries (usb charge port).

    Solved the constant false positive low batt warnings. Downside.... can't prove it yet (as not had too long) but suspect the cliff edge discharge profile means I get little to no advance warning before too low to drive valve.
  • Please providecsupport for rechargeable batteries
  • Yes, I have 4 thermostats, and 4 TRV'S, such a waste to use disposable batteries in all these devices. I have used rechargeable with mixed results, they are working in the thermostats but with the battery warning (something I can live with). But didn't work for me in the TRVs, maybe I need to try a different brand (I'm using cheap Amazon Basics rechargeables).

    This is an important green issue for Tado to resolve, very poor it has taken so long.
  • It's not something they can "fix" it's a consequence of the chemistry of rechargeable batteries, most will stop charging at 1.2v so they only way round it, that I can see, is tado code a slider into the device section that lets you turn off low battery warnings. They could still message you when the device goes offline and you would know it's dead but it may not work well in the final days / week death throws as the output from the batteries wouldn't have the juice to operate the internal mechanism and effectively close the actual rad valve.
  • One of the things Tado profiles itself with is that it is better for the environment because of the energy savings. Using a set of batteries every half year for each smart thermostat contradicts this. The curve of ni-mh batteries is different than conventional batteries, but they do work excellent. I really would like an option for each smart thermostat indicating the type of batteries you’ve put in. This can adjust the battery low warning. I will accept that the device goed more suddenly offline, due to the discharge curve.
  • I'm looking at adding about 10 TRVs. The only reason why I'm hesitating is due to the rechargeable batteries issue.

  • ErwinMErwinM
    edited October 12
    Dear TADO, the fact that rechargeable batteries cannot be use at this point in time makes the system too expensive for my wallet and my planet. I highly suggest this be looked at because as it stands it keeps me from expanding the system in my home and it prevents me from recommending the system wholeheartedly to friends, neighbors and family. Which is a shame, as I am very much a fan.
  • Come on Tado , start reducing waste and be a bit more part of the circulair economy! Within a couple of years the non rechargeable LR6 Alkaline battery is not the standard anymore. Do you know that companies like IKEA stop selling these type of batteries? It makes no sense that Tado isn't supporting rechargeable batteries yet. Please change this soon. https://newsroom.inter.ikea.com/news/ikea-to-remove-non-rechargeable-alkaline-batteries-by-2021/s/bd0e6e55-ccc4-46d6-8b37-bb1f9dfa24ff

  • Come on Tado... FFS lol
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