Few Words about Batteries… | Roberts Radio exprssion guide

A Few Words about Batteries…

Rechargeable batteries

Your Roberts Expression radio has been designed to use a choice of power sources. You may plug it into the mains using the supplied high- efﬁ ciency adaptor, or for listening away from the mains you may use either alkaline or rechargeable batteries. We do not recommend the use of carbon-zinc or zinc-chloride batteries.

It is very important that you read the advice and warnings given below.

1)Whichever type of batteries you choose to use, it is very important that the battery selection switch under the cover is set to the correct type.

a.If no batteries are ﬁ tted, then set the switch to the Alkaline position. This position minimises the power consumption when the radio is powered from the mains.

b.If Alkaline batteries are ﬁ tted, then set the switch to the Alkaline position.

c.If Rechargeable batteries are ﬁ tted, then set the switch to the NiMH position. Your radio is designed to use Nickel-Metal-Hydride rechargeable batteries. No other type of rechargeable battery should be used in the radio.

2)NEVER mix old and new Alkaline batteries. The old batteries may suffer damage and leak which will damage your radio and whatever the radio is standing on.

3)NEVER mix old and new Rechargeable batteries. This may result in unreliable charging and shortened battery life. Never mix Rechargeable batteries of different types or capacities even if they are new.

4)NEVER mix Alkaline and Rechargeable batteries. The recharging of Alkaline batteries can be very dangerous.

Your Expression radio uses a range of methods to ensure correct and safe charging of Rechargeable Nickel-Metal-Hydride batteries. These work to protect your batteries from excessive charge and discharge. These protections can only work properly if the advice above is followed. In particular, the radio will not be able to correctly charge batteries if they are a mixture of different brands, or different ages, or different capacities.

We recommend that all the rechargeable batteries used in your radio are bought together as a set. They should always be charged together and discharged together and not “borrowed” from time to time for other applications. This will ensure that they give their optimum performance in your radio.

We recommend that the rechargeable batteries that you use should be from a quality brand, and should be of at least 2500mAh capacity. Batteries of this capacity should power your radio for between 10 and 15 hours depending upon the volume of the radio, whether DAB or FM mode is used (DAB mode uses slightly less power than FM), and also depending on the condition of the batteries. Higher capacity batteries are available and will give longer life, but will generally be more expensive.

Before you ﬁ rst install a new set of rechargeable batteries into your radio you should ﬁ rst make sure that the battery type switch beneath the battery cover is in the NiMH position. Install the batteries arranging them as shown inside the battery compartment. Plug the mains adaptor into the radio and then into the mains socket. While the batteries are charging the charge indicator should show a ﬂ ashing green light. When the batteries are fully charged the indicator will stop ﬂ ashing and will show a steady green light. The time taken to charge the batteries will depend on how much charging they require. New batteries may be partly charged when

ﬁrst ﬁ tted, but it is normal for a set of batteries to take several hours to charge fully (this can be between 3 and 7 hours depending on the battery capacity and their initial state of charge).