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10

Maintenance-free Lead Acid battery 

Guidelines for maintenance-free Batteries: 
1. Battery should operate at temperatures between 15°C ~ 50°C. To ensure a longer life span, it 

should be kept between 5°C ~ 35°C. For optimum result, 20°C ~ 25°C will be ideal. When 
temperature falls 15 degrees below zero, battery will undergo some changes in its chemical 
contents and therefore cannot be recharged. Operating the battery at higher temperature will result 
in higher capacity but shorter lifespan, whereas lower temperatures operation has a longer lifespan 
but less capacity. 

2. If the battery is not recharged 72 hrs after it is completely used, it will be permanently damaged.  
3. When the battery is being charged, the internal gases will be electrolyzed into water at the 

negative charge, maintaining the battery’s storage abilities with no water added. However, erosion 
at the charged ends of the battery will cause poor performance.  

4. 

The battery’s cycle lifespan (no. of charge and discharge cycle) is determined by the degree at 
which power is dissipated, especially the degree of discharged each time it is used and the 
recovery charging method. For normal use, the battery can be used for longer hours when less 
power is dissipated each time and vice versa. At 25°C, maintenance-free batteries could be 
charged 150 ~ 200 times at 100% discharge each time.  

5. Decrease in capacity, internal short circuit, deformation in appearance, erosion of charged ends 

and decrease in open circuit voltage are symbols indicating battery is approaching the end of its 
life cycle. 

6. When two batteries are used in parallel connection, the resistance of the cables should be kept 

equal.  

  
Properties of the Lead Acid Battery: 
1. Has no memory effect. Can be charged anytime, even when the recharge indication light is off. 
2. Performance and efficiency are affected by changes in the environment, especially temperature 

and humidity. (Best operated between 20°C ~ 25°C) 

3. Battery discharge naturally according to a certain pattern even not in use. For best performance 

and a prolonged lifespan, it should be recharged every month even when not in use. 

4. Under normal circumstances, battery could last for about a year. 
5. 

When the battery’s life expires, possible indicators include internal short-circuit, decrease in 
capacity, deformation in appearance, erosion of charged ends and decrease in operating voltage.  

  
User’s Precautions: 
1. For first-time use, charge the battery for 10 hrs until it is fully charged. 
2. To maintain performance and lifespan, if product has not been used for 3 months after the initial 

shipment, please fully charge the battery.  

3. Befor

e each use, it’s advisable to charge the battery to its full capacity. 

4. The average lifespan of the battery is one year. The user is advised to change the battery after 

one year of use.  

5. The current consumption is in direct ratio with load current. The more current consumption, the 

less the operation time. 

 

 

Summary of Contents for presenter three

Page 1: ...Wireless Portable Amplifier System ISO 9001 2008 TAIWAN EXCELLENCE TAIWAN GOOD DESIGN GREEN PRODUCT I C 3 5 6 3 A S Q 5 0 1 6 I C 3 5 6 3 A S M 5 0 1 6 Operation manual...

Page 2: ...passive speaker 6 Wired microphone Remark Manufacturer reserves the rights to change the above combinations without prior notice FCC Caution To assure continued compliance any changes or modifications...

Page 3: ...utput 11 External speaker 12 WR1 channel selector 13 WR2 channel selector 14 Battery low indicator 15 Charging indicator 16 DC in 17 Fuse 18 Power switch 19 Battery compartment release PRESENTER THREE...

Page 4: ...SB Player and Digital Recorder have individual power switch on its panel When the Charging Battery Status Indicator glows RED it means the built in rechargeable battery is weak and needs to be charged...

Page 5: ...if it is in the last track In program entry mode Change to the next track file for program select In play mode pause mode program play mode random play mode Single pressed skip the playing track file...

Page 6: ...LL V EJECT When this key is pushed door is moved out V V PROG Set to programming mode When programming mode stop key is pushed then program is all cleared V MUTE When this key is pushed during CD is p...

Page 7: ...ttom cap 6 6 6 Locking button 7 Audio mute switch Setting button 8 Up button 9 Down button 11 Charging port 7 7 10 Battery installation Insert or replace the batteries according to the correct polarit...

Page 8: ...e is intended for charging as Alkaline battery can not be charged Wrong selection of battery will result in battery sensing electronics to display wrong and misleading status information 3 Making chan...

Page 9: ...na 1 1 Battery weak audio mute indicator 2 2 Power switch 3 8 Lavalier microphone Mini XLR connector 4 4 Audio mute switch 3 LCD 5 Charging port 6 Cover release button 7 7 Charging contacts 15 15 Sett...

Page 10: ...HANNEL FREQUENCY page The cursor will flash to allow changes to be made Pressing UP or DOWN button will increase or decrease the channel number The corresponding frequency will change accordingly When...

Page 11: ...apacity internal short circuit deformation in appearance erosion of charged ends and decrease in open circuit voltage are symbols indicating battery is approaching the end of its life cycle 6 When two...

Page 12: ...12I1300...

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