> For the complete documentation index, see [llms.txt](https://help.waterwatch.io/3.0.1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.waterwatch.io/3.0.1/battery-replacement-guides.md).

# Battery Replacement Guides

<figure><img src="/files/xELSvQwLMDaDMrmNKWDw" alt=""><figcaption><p>All Monitors purchased after October 2022 including T35 Fuel, T35 and LS1R</p></figcaption></figure>

{% content-ref url="/pages/K2mZxEoI0kZHE1sthaon" %}
[Battery Replacement (all models after Oct 2022 except external antenna)](/3.0.1/hardware-and-maintenance/maintenance/battery-replacement-all-models-after-oct-2022-except-external-antenna.md)
{% endcontent-ref %}

<figure><img src="/files/XtPsQAI8WQo80eAlZcxL" alt="" width="480"><figcaption><p>LS1R External Antenna</p></figcaption></figure>

{% file src="/files/p88Rg3eCOmhWQHc7Hj42" %}

<figure><img src="/files/ceNVMb1DR4CxUpglotwc" alt=""><figcaption><p>Tank monitors purchased before October 2022</p></figcaption></figure>

{% content-ref url="/pages/uj8iSscQSPD8gSBTxWEq" %}
[T35 Battery Replacement (before Oct 2022)](/3.0.1/hardware-and-maintenance/maintenance/t35-battery-replacement-before-oct-2022.md)
{% endcontent-ref %}

<figure><img src="/files/eHUFSp0M5GKeBPhl7fcY" alt=""><figcaption><p>LS1 Environmental monitors purchased before October 2022</p></figcaption></figure>

{% content-ref url="/pages/xFo2DGEtCz8s7YrB77JT" %}
[LS1R Battery Replacement (before Oct 2022)](/3.0.1/hardware-and-maintenance/maintenance/ls1r-battery-replacement-before-oct-2022.md)
{% endcontent-ref %}

<figure><img src="/files/lhuWYfhyh2E0QvgYbjAE" alt=""><figcaption><p>Tank monitor case upgrades</p></figcaption></figure>

{% content-ref url="/pages/-Mhzg4AKCaJL1NP3Cz8t" %}
[Upgrade T35 to T35-X](/3.0.1/hardware-and-maintenance/maintenance/upgrade-t35-to-t35-x.md)
{% endcontent-ref %}

<figure><img src="/files/hwg0nHn2lrer4X7PZuR3" alt=""><figcaption><p>LS1 environmental case upgrades</p></figcaption></figure>

{% content-ref url="/pages/Ymx68FzTHVEuqe3arYin" %}
[Upgrade LS1 to LS1R X](/3.0.1/hardware-and-maintenance/maintenance/upgrade-ls1-to-ls1r-x.md)
{% endcontent-ref %}