The Asus Zenfone 8 Flip appeared on the market in May 2021 and fits into our Premium ($600-$799) segment. It comes with a triple-camera setup, including a 64 MP main camera that flips open (hence the name). Here are some of its key test results in our Battery protocol.
Key specifications:
- Battery capacity: 5000 mAh
- 30W charger
- 6.67-inch, 1080 x 2400, 90 Hz OLED display
- Qualcomm Snapdragon 888 5G (5 nm) chipset
- Tested ROM / RAM combination: 256 GB + 8 GB
About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)
Test summary
Scoring
Sub-scores and attributes included in the calculations of the global score.
Asus Zenfone 8 Flip
102
battery
96
Honor X7b
Best: Honor X7b (221)
91
Samsung Galaxy M51
Best: Samsung Galaxy M51 (195)
116
Samsung Galaxy M51
Best: Samsung Galaxy M51 (198)
96
Realme GT Neo 5 (240W)
Best: Realme GT Neo 5 (240W) (224)
104
Realme GT Neo 5 (240W)
Best: Realme GT Neo 5 (240W) (212)
133
Nubia RedMagic 7 Pro
Best: Nubia RedMagic 7 Pro (205)
93
Apple iPhone 14 Pro
Best: Apple iPhone 14 Pro (194)
Key performances
These key points are derived from the lab measurements during testing and do not figure into the overall score. The lab measurements, however, are used for the overall score.
2h41 autonomy
after 5-minute charge
Please be aware that beyond this point, we have not modified the initial test results. While data and products remain fully comparable, you might encounter mentions and references to the previous scores.
Position in Global Ranking
153
rd
5. Honor Magic6 Lite (5800 mAh)
156
12. Honor Magic6 Lite (5300 mAh)
150
13. Realme GT Neo 5 (240W)
147
22. Samsung Galaxy S23 Ultra
142
32. Samsung Galaxy A15 LTE
137
33. Apple iPhone 13 Pro Max
136
33. Xiaomi Redmi Note 12 Pro 5G
136
43. Apple iPhone 15 Pro Max
134
43. Xiaomi Redmi Note 11 Pro 5G
134
47. Apple iPhone 14 Pro Max
133
47. Vivo X60 Pro 5G (Snapdragon)
133
47. Xiaomi Redmi Note 11S 5G
133
54. Xiaomi Redmi Note 12 5G
132
54. Xiaomi Redmi Note 10S
132
62. Oppo Reno6 Pro 5G (Snapdragon)
130
62. Samsung Galaxy S24 Ultra
130
64. Samsung Galaxy A34 5G
129
64. Samsung Galaxy A23 5G
129
64. Xiaomi Redmi Note 12 Pro+ 5G
129
64. Xiaomi Redmi Note 10 Pro
129
73. Samsung Galaxy A15 5G
127
82. Samsung Galaxy A13 5G
125
90. Apple iPhone 12 Pro Max
121
90. Samsung Galaxy A55 5G
121
93. Xiaomi Redmi Note 13 Pro 5G
120
93. Xiaomi Redmi Note 10 5G
120
100. Motorola Edge 20 Pro
118
100. Nubia RedMagic 7 Pro
118
105. Samsung Galaxy A14 5G
117
105. Xiaomi Redmi Note 13
117
113. Crosscall Stellar-X5
115
117. Samsung Galaxy Z Fold5
114
117. Xiaomi Mi 10T Pro 5G
114
122. Samsung Galaxy A54 5G
113
126. Motorola Moto G62 5G
112
130. Motorola Moto G9 Power
111
130. Samsung Galaxy S21 Ultra 5G (Snapdragon)
111
130. Xiaomi Redmi Note 13 Pro Plus 5G
111
136. Samsung Galaxy Z Flip5
109
136. Samsung Galaxy S24+ (Exynos)
109
140. Samsung Galaxy S21 5G (Snapdragon)
108
144. Samsung Galaxy S24 (Exynos)
107
144. Xiaomi Mi 11 Lite 5G
107
146. Samsung Galaxy A52 5G
106
150. Samsung Galaxy S22 Ultra (Snapdragon)
103
153. Motorola moto g34 5G
102
157. Samsung Galaxy S23 FE
101
157. Samsung Galaxy A35 5G
101
159. Samsung Galaxy S21 5G (Exynos)
100
159. Xiaomi Redmi 10 2022
100
164. Apple iPhone 13 mini
99
164. Samsung Galaxy Z Fold4
99
164. Vivo X80 Pro (Snapdragon)
99
169. Motorola Edge 30 Pro
98
169. Samsung Galaxy S22 Ultra (Exynos)
98
173. Samsung Galaxy A33 5G
96
176. Samsung Galaxy Z Flip4
95
176. Samsung Galaxy S22+ (Exynos)
95
176. Samsung Galaxy A53 5G
95
181. Xiaomi Redmi Note 13 5G
94
183. Apple iPhone 12 mini
93
183. Samsung Galaxy S21 Ultra 5G (Exynos)
93
186. Samsung Galaxy Z Fold3 5G
92
187. Motorola moto g54 5G
90
187. Samsung Galaxy S22 (Snapdragon)
90
193. Apple iPhone SE (2022)
84
195. Samsung Galaxy S21 FE 5G (Snapdragon)
82
199. Samsung Galaxy S22 (Exynos)
75
Position in Premium Ranking
29
th
2. Vivo X60 Pro 5G (Snapdragon)
133
4. Oppo Reno6 Pro 5G (Snapdragon)
130
25. Samsung Galaxy S21 5G (Snapdragon)
108
26. Samsung Galaxy S24 (Exynos)
107
31. Samsung Galaxy S21 5G (Exynos)
100
38. Samsung Galaxy S22 (Snapdragon)
90
40. Samsung Galaxy S21 FE 5G (Snapdragon)
82
42. Samsung Galaxy S22 (Exynos)
75
Pros
- More than 2 days of autonomy with moderate use
- Good autonomy for calibrated 3G calling and gaming
Cons
- Poor charging experience compared to other devices in its segment
- High power consumption when streaming video
- No wireless charging
The Asus Zenfone 8 Flip has the largest battery capacity (5000 mAh) in this comparison. Coming with a 30W charger, it has the same global score as the Samsung Galaxy S21 5G (Exynos); but both the Asus and Samsung devices come in behind the OnePlus 9, thanks to its outstanding charging experience and better efficiency.
The table below shows the battery capacity, tested charger, display type and resolution, and processor specifications for all three of these Premium devices.
|
Asus Zenfone 8 Flip |
Samsung Galaxy S21 5G (Exynos) |
OnePlus 9 |
| Battery capacity |
5000 mAh |
4000 mAh |
4500 mAh |
| Charger
Wireless |
30W
No
|
25W (not included)
15W |
65W
15W
|
| Display type |
AMOLED |
AMOLED |
AMOLED |
| Display resolution |
1080 x 2400 |
1080 x 2400 |
1080 x 2400 |
| Chipset |
Qualcomm Snapdragon 888 5G 5 nm |
Exynos 2100 5 nm |
Qualcomm Snapdragon 888 5G 5 nm |
Autonomy (55)
How long a battery charge lasts depends not only on battery capacity but also on other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.
72h
Light Usage
Active: 2h30/day
49h
Moderate Usage
Active: 4h/day
30h
Intense Usage
Active: 7h/day
The Asus Zenfone 8 Flip comes out ahead of the Samsung Galaxy S21 5G (Exynos) but remains behind the OnePlus 9 in our Autonomy tests.
Position in Global Ranking
Battery Life (moderate)
147
th
9. Samsung Galaxy A15 LTE
78h
10. Honor Magic6 Lite (5800 mAh)
77h
12. Honor Magic6 Lite (5300 mAh)
77h
20. Xiaomi Redmi Note 11S 5G
72h
27. Xiaomi Redmi Note 10 5G
70h
31. Apple iPhone 15 Pro Max
69h
32. Samsung Galaxy A15 5G
69h
34. Samsung Galaxy A13 5G
69h
36. Apple iPhone 13 Pro Max
68h
38. Xiaomi Redmi Note 10 Pro
67h
39. Samsung Galaxy S23 Ultra
67h
40. Xiaomi Redmi Note 12 5G
67h
46. Samsung Galaxy A34 5G
65h
48. Apple iPhone 14 Pro Max
65h
51. Samsung Galaxy A23 5G
64h
57. Motorola Moto G9 Power
64h
60. Xiaomi Redmi Note 12 Pro 5G
62h
61. Samsung Galaxy A14 5G
62h
62. Xiaomi Redmi Note 11 Pro 5G
62h
63. Xiaomi Redmi Note 10S
61h
66. Samsung Galaxy A54 5G
60h
85. Samsung Galaxy A55 5G
57h
92. Samsung Galaxy S24 Ultra
56h
94. Samsung Galaxy A52 5G
56h
95. Xiaomi Redmi Note 13 Pro 5G
56h
97. Xiaomi Redmi Note 12 Pro+ 5G
55h
98. Realme GT Neo 5 (240W)
55h
108. Xiaomi Mi 11 Lite 5G
54h
109. Samsung Galaxy Z Fold5
54h
113. Motorola moto g54 5G
53h
115. Nubia RedMagic 7 Pro
53h
121. Motorola Edge 20 Pro
52h
132. Xiaomi Mi 10T Pro 5G
51h
136. Vivo X60 Pro 5G (Snapdragon)
51h
137. Xiaomi Redmi Note 13 5G
50h
143. Samsung Galaxy S21 5G (Snapdragon)
50h
145. Samsung Galaxy A35 5G
49h
146. Samsung Galaxy A53 5G
49h
151. Samsung Galaxy S24+ (Exynos)
49h
153. Xiaomi Redmi Note 13 Pro Plus 5G
49h
154. Samsung Galaxy S24 (Exynos)
49h
155. Apple iPhone 12 Pro Max
49h
156. Samsung Galaxy Z Fold4
49h
158. Samsung Galaxy S21 Ultra 5G (Snapdragon)
48h
160. Oppo Reno6 Pro 5G (Snapdragon)
48h
163. Motorola Edge 30 Pro
47h
164. Samsung Galaxy A33 5G
47h
165. Samsung Galaxy S22 Ultra (Snapdragon)
47h
166. Samsung Galaxy S23 FE
47h
168. Samsung Galaxy Z Flip5
46h
169. Samsung Galaxy S21 5G (Exynos)
46h
171. Nubia RedMagic 6 Pro
46h
176. Samsung Galaxy S22 Ultra (Exynos)
44h
179. Vivo X80 Pro (Snapdragon)
43h
181. Samsung Galaxy Z Fold3 5G
43h
182. Samsung Galaxy Z Flip4
42h
184. Samsung Galaxy S21 Ultra 5G (Exynos)
41h
186. Apple iPhone 13 mini
41h
187. Apple iPhone 12 mini
40h
189. Samsung Galaxy S22+ (Exynos)
40h
190. Samsung Galaxy S22 (Snapdragon)
39h
193. Samsung Galaxy S21 FE 5G (Snapdragon)
38h
196. Apple iPhone SE (2022)
37h
198. Samsung Galaxy S22 (Exynos)
35h
Position in Premium Ranking
Battery Life (moderate)
23
rd
20. Vivo X60 Pro 5G (Snapdragon)
51h
22. Samsung Galaxy S21 5G (Snapdragon)
50h
25. Samsung Galaxy S24 (Exynos)
49h
27. Oppo Reno6 Pro 5G (Snapdragon)
48h
29. Samsung Galaxy S21 5G (Exynos)
46h
37. Samsung Galaxy S22 (Snapdragon)
39h
39. Samsung Galaxy S21 FE 5G (Snapdragon)
38h
42. Samsung Galaxy S22 (Exynos)
35h
Stationary
Vivo Y72 5G
Best: Vivo Y72 5G (104)
A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power.
The Asus Zenfone 8 Flip lasted 56 hours 34 minutes in our TUS — five hours longer than the Samsung, but 49 minutes less than the OnePlus. The Asus device lost 2% of its battery charge during the night, which is better than its competitors.
Typical Usage Scenario discharge curves
On the go
Samsung Galaxy M51
Best: Samsung Galaxy M51 (96)
Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.
Although it put in an average performance for social apps, the Asus device did not do well when using its camera and GPS navigation and when calling on the go.
Autonomy for on the go use cases (full charge)
Calibrated
Samsung Galaxy M51
Best: Samsung Galaxy M51 (100)
For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.
The Zenfone 8 Flip did well for 3G call, gaming, and idle management in our calibrated tests, considerably better than its rivals. Both the Asus and the OnePlus did better than the Samsung Galaxy S21 5G (Exynos), which brought up the rear in nearly all calibrated tests.
Autonomy for calibrated use cases (full charge)
Charging (68)
The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from zero to 80% capacity and from 80 to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes.
Full charge
Black Shark 5 Pro
Best: Black Shark 5 Pro (121)
Power consumption and battery level during full charge
The Asus Zenfone 8 Flip needs 2 hours 19 minutes to go from completely empty to completely full. This is much slower than the OnePlus 9, whose 65W charger fills its 4500 mAh battery in only 39 minutes.
Two points worth noting is that (1) unlike its competitors, the Asus does not support wireless charging; and (2) its 30W charger actually charges at 25W.
Position in Global Ranking
Charging Time 0-80%
156
th
1. Realme GT Neo 5 (240W)
0h08
24. Oppo Reno6 Pro 5G (Snapdragon)
0h22
31. Xiaomi Redmi Note 12 Pro+ 5G
0h24
32. Vivo X80 Pro (Snapdragon)
0h24
37. Xiaomi Redmi Note 13 Pro Plus 5G
0h26
59. Xiaomi Redmi Note 13 Pro 5G
0h31
64. Xiaomi Redmi Note 12 Pro 5G
0h33
74. Samsung Galaxy S23 Ultra
0h37
75. Samsung Galaxy S22+ (Exynos)
0h37
79. Samsung Galaxy S24 Ultra
0h38
80. Xiaomi Redmi Note 11 Pro 5G
0h38
83. Samsung Galaxy S22 Ultra (Snapdragon)
0h39
84. Samsung Galaxy S22 Ultra (Exynos)
0h40
85. Vivo X60 Pro 5G (Snapdragon)
0h40
91. Samsung Galaxy S24+ (Exynos)
0h42
97. Xiaomi Redmi Note 12 5G
0h44
100. Honor Magic5 Lite 5G
0h46
101. Samsung Galaxy S21 Ultra 5G (Snapdragon)
0h46
102. Honor Magic6 Lite (5300 mAh)
0h47
105. Samsung Galaxy Z Flip5
0h48
107. Samsung Galaxy S21 5G (Exynos)
0h48
109. Samsung Galaxy S21 5G (Snapdragon)
0h49
110. Samsung Galaxy S24 (Exynos)
0h49
111. Xiaomi Redmi Note 11
0h49
112. Samsung Galaxy S23 FE
0h49
114. Samsung Galaxy A23 5G
0h49
117. Samsung Galaxy S22 (Snapdragon)
0h50
119. Samsung Galaxy Z Fold5
0h51
120. Samsung Galaxy S22 (Exynos)
0h51
121. Samsung Galaxy A35 5G
0h51
123. Samsung Galaxy A34 5G
0h51
123. Apple iPhone SE (2022)
0h51
125. Samsung Galaxy S21 Ultra 5G (Exynos)
0h51
126. Apple iPhone 12 mini
0h52
127. Xiaomi Redmi Note 10S
0h52
128. Xiaomi Redmi Note 10
0h52
130. Samsung Galaxy A55 5G
0h52
131. Samsung Galaxy A54 5G
0h52
133. Xiaomi Redmi Note 13 5G
0h53
134. Samsung Galaxy S21 FE 5G (Snapdragon)
0h53
137. Samsung Galaxy A33 5G
0h54
137. Xiaomi Redmi Note 11S 5G
0h54
139. Samsung Galaxy A15 LTE
0h54
140. Samsung Galaxy A15 5G
0h54
141. Apple iPhone 15 Plus
0h54
142. Xiaomi Redmi Note 10 Pro
0h55
143. Apple iPhone 15 Pro Max
0h56
144. Samsung Galaxy Z Fold4
0h56
145. Honor Magic6 Lite (5800 mAh)
0h56
147. Samsung Galaxy A53 5G
0h57
148. Samsung Galaxy Z Flip4
0h57
149. Apple iPhone 12 Pro Max
0h57
150. Apple iPhone 13 mini
0h57
151. Samsung Galaxy Z Fold3 5G
0h57
157. Apple iPhone 13 Pro Max
1h01
161. Apple iPhone 14 Plus
1h03
167. Apple iPhone 14 Pro Max
1h06
173. Motorola moto g34 5G
1h12
175. Samsung Galaxy A52 5G
1h15
178. Crosscall Stellar-X5
1h20
181. Xiaomi Redmi Note 10 5G
1h22
184. Xiaomi Redmi 10 2022
1h25
186. Motorola Moto G62 5G
1h26
187. Motorola moto g54 5G
1h26
188. Samsung Galaxy A14 5G
1h28
189. Samsung Galaxy A13 5G
1h30
196. Motorola Moto G9 Power
1h53
Position in Premium Ranking
Charging Time 0-80%
39
th
11. Oppo Reno6 Pro 5G (Snapdragon)
0h22
23. Vivo X60 Pro 5G (Snapdragon)
0h40
28. Samsung Galaxy S21 5G (Exynos)
0h48
29. Samsung Galaxy S24 (Exynos)
0h49
30. Samsung Galaxy S21 5G (Snapdragon)
0h49
31. Samsung Galaxy S22 (Snapdragon)
0h50
33. Samsung Galaxy S22 (Exynos)
0h51
35. Samsung Galaxy S21 FE 5G (Snapdragon)
0h53
Quick boost
Realme GT Neo 3
Best: Realme GT Neo 3 (111)
By plugging in the Zenfone 8 Flip for 5 minutes with less than 50% of battery charge remaining, users will gain more than 2.5 hours autonomy. These results are almost the same as the Samsung phone, but far behind the OnePlus 9’s gain of 6 hours.
| |
| Asus Zenfone 8 Flip | Samsung Galaxy S21 5G (Exynos) | OnePlus 9 |
| Autonomy boost (hh:mm) | 20% | 2:51 | 2:33 | 8:26 |
| 40% | 2:39 | 2:36 | 5:59 |
| 60% | 2:21 | 2:05 | 5:28 |
| 80% | 1:18 | 2:01 | 4:02 |
| Percentage boost | 20% | 8.2 % | 7.4 % | 23 % |
| 40% | 7.6 % | 7.6 % | 16.3 % |
| 60% | 6.7 % | 6.1 % | 14.9 % |
| 80% | 3.7 % | 5.9 % | 11 % |
| Energy consumed | 20% | 1998 mWh | 1458 mWh | 4923 mWh |
| 40% | 1857 mWh | 1487 mWh | 3491 mWh |
| 60% | 1645 mWh | 1192 mWh | 3188 mWh |
| 80% | 911 mWh | 1148 mWh | 2354 mWh |
Efficiency (68)
The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge rate, both of which combine data obtained during robot-based typical usage scenario testing, outdoor mobility testing, charging evaluation, and power measurements, and then take into consideration the device’s battery capacity.
The Asus Zenfone 8 Flip showed good performance in some specific tests, but lagged behind its rivals overall.
Charge up
Nubia RedMagic 7 Pro
Best: Nubia RedMagic 7 Pro (105)
The Asus Zenfone 8 Flip has a fairly efficient charging system and charger, but less efficient than its rivals in both cases, as it has higher residual power drain when unplugged than the Samsung and OnePlus.
Discharge
Apple iPhone 13 Pro
Best: Apple iPhone 13 Pro (121)
The Asus device had very high consumption for video streaming, but considerably lower discharge for gaming, 3G call, and idle management than the competition.
Conclusion
The Asus Zenfone 8 Flip does not offer a very good charging experience, but provides more than 2 days of autonomy with moderate use.
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