Aguri cordless pressure washer battery

How To Look After Your Lithium-ion Battery

Date: 16/02/2023

Why won’t my lithium-ion battery charge any more?

Nearly all Aguri cordless pressure washers and sat navs, and most of the portable electronic products you buy will include a lithium-ion battery. Lithium-ion batteries are a game changer as they are smaller, lighter, faster to charge and last longer than previous battery types. However, despite all these benefits, there are a few useful tips you should consider to prolong the life and health of your batteries.

Store your lithium-ion batteries or devices that incorporate a lithium-ion battery at room temperature.
Extreme cold and extreme heat can have a detrimental affect on lithium-ion batteries. So, if you have one of our cordless pressure washers, don’t leave the battery in a garage, shed or out-house, for long periods of time – especially over the winter. All our sat navs include lithium-ion batteries as well, so avoid leaving them in your vehicle for long periods of time if they are not being used regularly, or you may find it is no longer possible to charge it.

Allow partial discharges and avoid full ones (usually)
This advice refers more to sat navs than something like a cordless pressure washer, as you are likely to always run a cordless pressure washer battery to it’s lowest level which it is designed to cater for. Unlike NiCad batteries, lithium-ion batteries do not have a charge memory. That means deep-discharge cycles are not required. In fact, it’s better for the battery to use partial-discharge cycles. There is one exception. Battery experts suggest that after 30 charges, you should allow lithium-ion batteries to almost completely discharge. Continuous partial discharges create a condition called digital memory, decreasing the accuracy of the device’s power gauge. So let the battery discharge to the cut-off point and then recharge. The power gauge will be recalibrated.

Avoid completely discharging lithium-ion batteries
If a lithium-ion battery is discharged below 2.5 volts per cell, a safety circuit built into the battery opens and the battery appears to be dead. The original charger will be of no use. Only battery analysers with the boost function have a chance of recharging the battery. All Aguri lithium-ion batteries have safety software preventing the battery from being discharged to this level during normal use. However, it is important to ensure that the battery or the device including the battery, is not left for long periods of time with no charge or very low charge. If the battery or device is not going to be used for a sustained period of time, periodically charge it to around 40% – 50% to help maintain battery health.

For extended storage, discharge a lithium-ion battery to about 40 percent and store it at room temperature – not in your garage or shed!
If you know you are not going to be using a lithium-ion battery or device for a few weeks or months, especially over winter, store it at room temperature with about 40% to 50% charge. Do not store the battery with either no charge or fully charged, and don’t leave it where it can get particularly cold like a shed or garage, as this will reduce the affective life of the battery and you may find that you can no longer charge it when you try and use it again.

How much does a new battery cost for my Aguri cordless pressure washer ?
Replacement batteries for the Aguri Power Clean P40 Max cost £54.99 inc vat and postage and are available to purchase here

How much is a replacement battery cost for my Aguri sat nav?
Replacement batteries for Aguri sat navs vary depending on the model. Please call our tech support team on 0330 102 5578 for further details

Click here for more information on our range of cordless pressure washers

Frequently asked questions

Why won’t my Aguri sat nav power on any more?

Why won’t my Aguri sat nav charge?

My sat nav won’t charge?

Why won’t my P40 battery charge?


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