New Giant battery800 watt-hour upgrade also for older bikes

Adrian Kaether

 · 13.02.2023

The new Energy Pak Smart 800 with the corresponding charger.
Photo: Adrian Kaether
Giant's new giant Energy Pak Smart 800 battery weighs little more than the familiar 625 and also fits into many older e-MTBs. This also makes the new e-bike battery an interesting upgrade. We have already been able to test it extensively.

Giant is one of the first e-bike manufacturers to present a new battery with 22,700 cells from Panasonic. The new battery offers a capacity of 800 watt hours, is compatible with the six-amp fast charger thanks to smart electronics and could also be an exciting retrofit option. Thanks to its compact design, the energy source also fits into many older e-bikes from model year 2019 (see below). It is therefore an additional option to the existing 500, 625 and 750 batteries that are currently installed in Giant mountain bikes.

The Energy Pak Smart 800 is rather short and therefore also fits into many older bikes. You may just need a new battery cover.Photo: Adrian KaetherThe Energy Pak Smart 800 is rather short and therefore also fits into many older bikes. You may just need a new battery cover.

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Giant Energy Pak Smart 800 battery: Technical data at a glance

  • Capacity: 811 watt hours (factory specification)
  • Cell type: Li-Ion 22700
  • Dimensions: 44 x 8.5 x 7.8 centimetres
  • Weight: 4347 grams (EMTB measurement)
  • Weather protection rating: IPX6 (protected against short-term submersion)
  • Price: 1099.90 euros (RRP)

Giant Energy Pak Smart 800: Not much heavier than a 625 Wh e-bike battery

The main disadvantage: at €1099.90 RRP and street prices starting at €900, the new bike battery is not exactly cheap. However, for e-bikes currently still running on 500 or 625 watt hours, the upgrade could be worthwhile in terms of range, especially as the additional weight is surprisingly manageable compared to smaller batteries. The new Giant battery weighed 4365 grams in our test lab - less than 400 grams more than the Giant battery with 625 watt hours (3987 grams - EMTB measurement). At 4260 grams, the Giant battery with 750 watt hours is also only marginally lighter than the new 800.

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This means that the new Giant Energy Pak Smart 800 offers a much better weight-to-watt-hour ratio than its smaller brothers. The 625 in particular is significantly lower in this respect with 6.4 grams/watt hour compared to the 5.45 grams/watt hour of the new battery. If the new 800 battery had the same capacity-to-weight ratio as the old 625, it would have to weigh well over five kilograms!

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At almost 4 kilos, the previous 625 Giant battery is one of the heaviest of its size.Photo: Max FuchsAt almost 4 kilos, the previous 625 Giant battery is one of the heaviest of its size.

The range of the 800 Wh battery in the test: Giant gets closer to Bosch

The exciting question: What about the range? Can the Giants Energy Pak Smart 800 also shine here with a clear advantage over its predecessors? According to the manufacturer, the capacity of the new 800 battery is 28 per cent higher than that of the 625 watt-hour bike battery and can convert this advantage almost one-to-one into range. In our standardised range tests in turbo mode, with a 90-kilo rider and 150 watts of pedalling power, the 625 Wh battery climbed 1417 metres in altitude. The new 800 Wh battery achieves 1827 metres in altitude with identical parameters and thus meets our expectations very precisely due to the increased capacity.

However, the new 800 Giant battery behaves slightly differently to older batteries from the manufacturer: It pushes smoothly almost to the end and only falls into an emergency mode with reduced power shortly before it is completely discharged. With older Giant batteries, this emergency mode is much longer and hardly delivers any thrust. Although a few more metres in altitude are possible with an almost empty battery, due to the low motor support, these are mainly the responsibility of the rider, who still moves the bike forwards primarily under their own power.

The new Energy Pak Smart 800 is usually combined with the powerful but large Smart Charger in new bikes.Photo: Adrian KaetherThe new Energy Pak Smart 800 is usually combined with the powerful but large Smart Charger in new bikes.

Interesting: In terms of both weight and range, the new 800 Giant battery is very close to the 75o battery in the Bosch Smart System. With 100 grams less weight and an often slightly better range, the Bosch battery is still ahead, but only slightly. However, this is also reflected in a greater charging effort of regularly over 850 watt hours. However, the Bosch also has a decisive disadvantage: it cannot be retrofitted to older bikes, as the new Smart system is no longer compatible with older Bosch systems.

EMTB measured values Giant batteries at a glance:

  • Energy Pak Smart 800: 4365 grams, 1827 (+66) vertical metres @12.7 km/h, charging power: 810 Wh
  • Energy Pak Smart 750: 4260 grams, 1657 (+224) vertical metres @13.7 km/h, charging power: 798 Wh
  • Energy Pak Smart 625: 3987 grams, 1417 (+145) vertical metres @12.5 km/h, charging power: 659 Wh
  • z. Cf.: Bosch Powertube 750: approx. 4320 grams, 1750 - 1950 metres in altitude, charging power 850 to 900 Wh
Our range measurement rides are always carried out on the same steep tarmac climb with a rider weight of 90 kilograms and 150 watts of pedalling power. To check these parameters, we use measurement technology from Garmin, such as the Rallye XC200 wattage measurement pedals.Photo: Adrian KaetherOur range measurement rides are always carried out on the same steep tarmac climb with a rider weight of 90 kilograms and 150 watts of pedalling power. To check these parameters, we use measurement technology from Garmin, such as the Rallye XC200 wattage measurement pedals.

Compatibility: Giant Trance from model year 2019, Reign and Stance from 2020

The Energy Pak Smart 800 e-bike battery pack fits into the 2022 Giant Reign and Trance models. The Giant Fullys Reign and Stance are compatible with the new battery from model year 2020, the Trance even from model year 2019. However, all these e-bikes require a new battery cover, which costs around 40 euros extra.

All information on compatibility and the matching additional covers can be found on the Giant website.

Giant Energy Pak Smart with 800 watt hoursPhoto: HerstellerGiant Energy Pak Smart with 800 watt hours

Conclusion Adrian Kaether - Editor EMTB

EMTB editor Adrian Kaether.Photo: Max FuchsEMTB editor Adrian Kaether.
With the heavy and short-range 625 battery, Giant had fallen somewhat behind the competition. The new 800 is a significant step forward and is back on a par with the competition in terms of both watt hours per kilogramme and absolute range. Nice: The new battery is compatible with many older models and can therefore also make sense as an - albeit expensive - upgrade. Especially those who want to enjoy their bike for a long time to come and don't always need the latest technology might find this interesting.

Adrian Kaether's favourite thing to do is ride mountain bikes on bumpy enduro trails. The tech expert and bike tester knows all about Newton metres and watt hours, high and low-speed damping. As test manager at MYBIKE, Adrian also likes to think outside the box and tests cargo bikes and step-through bikes as well as the latest (e-)MTBs.

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