Question [Q] China Tablet, power consumption

Hi,

i ordered a China tablet, Aoson M723
but when i'm playing games the battery is empty within one hour...
is this normal?!

Brand AOSON
Model M723
Quantity 1 Piece/Pack
Color White + black
Shell Material ABS
Operating System Android 4.1.1
CPU Type Quad Core
Processor Model Actions ATM7029
Processor Speed 1.2GHz
GPU GC1000+
Memory 1GB
Memory Type DDR3 SDRAM
Capacity 8GB
Extend Card Type TF/Micro SD
Max Extend Card Capacity 32 GB
Other Functions G-Sensor HDMI Dual Cameras
Screen Size 7 Inch
Resolution 1024 x 600
Screen Features Multi-touch screen
Touch Control Capacitive screen
Supported Network Type Wi-Fi External 3G External Wired Network
Wi-Fi 802.11 b/g/n
3G Supports external 3G
Bluetooth No
Wired Network Yes
Audio Format MP3 / WMA / APE / FLAC / AAC / OGG / AC3 / WAV
Video Format MKV (H.264 HP) / AVI / RM / RMVB / FLV / WMV9 / MP4
E-book Format PDF / EXE / TXT / HTML
Picture Format JPEG / BMP / GIF / PNG
OS Language Afrikaans Simplified Chinese Traditional Chinese English Japanese Dutch Danish Amharic Polish Portuguese French German Thai Zulu Turkish Finnish Swedish Malay Swahili Tagalog Latvian Croatian Indonesian Greek Arabic Hungarian Italian
Front Camera 300KP
Back Camera 2.0MP
Battery Type Li-ion polymer
Battery Voltage 3.7 V
Battery Capacity 2800 mAh
Charge Methods Power adapter
Charge Time 5 Hours
Standby Time 128 Hours
Work Time 10 Hours for book reading; 5~6 hours for video playing
Power Adapter Input 100~240V
Power Adapter Output 5V 2A
Power Adapter Plug Size 2.5mm
Google Play (Android Market) Yes
Speaker Built-in
Microphone Built-in
Slots and Ports 1 x Micro USB port 1 x 3.5mm eaphone jack 1 x 2.5mm power port 1 x Mini HDMI jack 1 x TF card slot
Packing List 1 x Tablet PC1 x Earphone (110cm)1 x Data cable (70cm)1 x Power adapter (EU plug/90cm-cable)1 x English user manual
Dimensions: 7.48 in x 4.72 in x 0.39 in (19.0 cm x 12.0 cm x 1.0 cm)
Weight: 10.37 oz (294 g)

regards, Jeroen